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#!/usr/bin/env python
# -*- coding: Utf8 -*-
"""Generate Python documentation in HTML for Scribus.
Based on the PyDoc package.
"""

__author__ = "Petr Vanek <petr@yarpen.cz>"
__date__ = "2004/12/27"
__version__ = "$Id: scridoc.py 1062 2005-01-02 19:31:13Z subik $"
__credits__ = "Ka-Ping Yee <ping@lfw.org> for PyDoc"

import sys, imp, os, re, types, inspect, __builtin__
from repr import Repr
from string import expandtabs, find, join, lower, split, strip, rfind, rstrip

# --------------------------------------------------------- common routines
def pathdirs():
    """Convert sys.path into a list of absolute, existing, unique paths."""
    dirs = []
    normdirs = []
    for dir in sys.path:
        dir = os.path.abspath(dir or '.')
        normdir = os.path.normcase(dir)
        if normdir not in normdirs and os.path.isdir(dir):
            dirs.append(dir)
            normdirs.append(normdir)
    return dirs

def getdoc(object):
    """Get the doc string or comments for an object."""
    result = inspect.getdoc(object) or inspect.getcomments(object)
    return result and re.sub('^ *\n', '', rstrip(result)) or ''

def splitdoc(doc):
    """Split a doc string into a synopsis line (if any) and the rest."""
    lines = split(strip(doc), '\n')
    if len(lines) == 1:
        return lines[0], ''
    elif len(lines) >= 2 and not rstrip(lines[1]):
        return lines[0], join(lines[2:], '\n')
    return '', join(lines, '\n')

def classname(object, modname):
    """Get a class name and qualify it with a module name if necessary."""
    name = object.__name__
    if object.__module__ != modname:
        name = object.__module__ + '.' + name
    return name

def isdata(object):
    """Check if an object is of a type that probably means it's data."""
    return not (inspect.ismodule(object) or inspect.isclass(object) or
                inspect.isroutine(object) or inspect.isframe(object) or
                inspect.istraceback(object) or inspect.iscode(object))

def replace(text, *pairs):
    """Do a series of global replacements on a string."""
    while pairs:
        text = join(split(text, pairs[0]), pairs[1])
        pairs = pairs[2:]
    return text

def cram(text, maxlen):
    """Omit part of a string if needed to make it fit in a maximum length."""
    if len(text) > maxlen:
        pre = max(0, (maxlen-3)//2)
        post = max(0, maxlen-3-pre)
        return text[:pre] + '...' + text[len(text)-post:]
    return text

def stripid(text):
    """Remove the hexadecimal id from a Python object representation."""
    # The behaviour of %p is implementation-dependent; we check two cases.
    for pattern in [' at 0x[0-9a-f]{6,}(>+)$', ' at [0-9A-F]{8,}(>+)$']:
        if re.search(pattern, repr(Exception)):
            return re.sub(pattern, '\\1', text)
    return text

def _is_some_method(object):
    return inspect.ismethod(object) or inspect.ismethoddescriptor(object)

def allmethods(cl):
    methods = {}
    for key, value in inspect.getmembers(cl, _is_some_method):
        methods[key] = 1
    for base in cl.__bases__:
        methods.update(allmethods(base)) # all your base are belong to us
    for key in methods.keys():
        methods[key] = getattr(cl, key)
    return methods

def _split_list(s, predicate):
    """Split sequence s via predicate, and return pair ([true], [false]).

    The return value is a 2-tuple of lists,
        ([x for x in s if predicate(x)],
         [x for x in s if not predicate(x)])
    """

    yes = []
    no = []
    for x in s:
        if predicate(x):
            yes.append(x)
        else:
            no.append(x)
    return yes, no

def visiblename(name):
    """Decide whether to show documentation on a variable."""
    # Certain special names are redundant.
    if name in ['__builtins__', '__doc__', '__file__', '__path__',
                '__module__', '__name__']: return 0
    # Private names are hidden, but special names are displayed.
    if name.startswith('__') and name.endswith('__'): return 1
    return not name.startswith('_')

# ----------------------------------------------------- module manipulation

def ispackage(path):
    """Guess whether a path refers to a package directory."""
    if os.path.isdir(path):
        for ext in ['.py', '.pyc', '.pyo']:
            if os.path.isfile(os.path.join(path, '__init__' + ext)):
                return True
    return False

def synopsis(filename, cache={}):
    """Get the one-line summary out of a module file."""
    mtime = os.stat(filename).st_mtime
    lastupdate, result = cache.get(filename, (0, None))
    if lastupdate < mtime:
        info = inspect.getmoduleinfo(filename)
        file = open(filename)
        if info and 'b' in info[2]: # binary modules have to be imported
            try: module = imp.load_module('__temp__', file, filename, info[1:])
            except: return None
            result = split(module.__doc__ or '', '\n')[0]
            del sys.modules['__temp__']
        else: # text modules can be directly examined
            line = file.readline()
            while line[:1] == '#' or not strip(line):
                line = file.readline()
                if not line: break
            line = strip(line)
            if line[:4] == 'r"""': line = line[1:]
            if line[:3] == '"""':
                line = line[3:]
                if line[-1:] == '\\': line = line[:-1]
                while not strip(line):
                    line = file.readline()
                    if not line: break
                result = strip(split(line, '"""')[0])
            else: result = None
        file.close()
        cache[filename] = (mtime, result)
    return result

class ErrorDuringImport(Exception):
    """Errors that occurred while trying to import something to document it."""
    def __init__(self, filename, (exc, value, tb)):
        self.filename = filename
        self.exc = exc
        self.value = value
        self.tb = tb

    def __str__(self):
        exc = self.exc
        if type(exc) is types.ClassType:
            exc = exc.__name__
        return 'problem in %s - %s: %s' % (self.filename, exc, self.value)

def importfile(path):
    """Import a Python source file or compiled file given its path."""
    magic = imp.get_magic()
    file = open(path, 'r')
    if file.read(len(magic)) == magic:
        kind = imp.PY_COMPILED
    else:
        kind = imp.PY_SOURCE
    file.close()
    filename = os.path.basename(path)
    name, ext = os.path.splitext(filename)
    file = open(path, 'r')
    try:
        module = imp.load_module(name, file, path, (ext, 'r', kind))
    except:
        raise ErrorDuringImport(path, sys.exc_info())
    file.close()
    return module

def safeimport(path, forceload=0, cache={}):
    """Import a module; handle errors; return None if the module isn't found.

    If the module *is* found but an exception occurs, it's wrapped in an
    ErrorDuringImport exception and reraised.  Unlike __import__, if a
    package path is specified, the module at the end of the path is returned,
    not the package at the beginning.  If the optional 'forceload' argument
    is 1, we reload the module from disk (unless it's a dynamic extension)."""

    if forceload and path in sys.modules:
        # This is the only way to be sure.  Checking the mtime of the file
        # isn't good enough (e.g. what if the module contains a class that
        # inherits from another module that has changed?).
        if path not in sys.builtin_module_names:
            # Python never loads a dynamic extension a second time from the
            # same path, even if the file is changed or missing.  Deleting
            # the entry in sys.modules doesn't help for dynamic extensions,
            # so we're not even going to try to keep them up to date.
            info = inspect.getmoduleinfo(sys.modules[path].__file__)
            if info[3] != imp.C_EXTENSION:
                cache[path] = sys.modules[path] # prevent module from clearing
                del sys.modules[path]
    try:
        module = __import__(path)
    except:
        # Did the error occur before or after the module was found?
        (exc, value, tb) = info = sys.exc_info()
        if path in sys.modules:
            # An error occured while executing the imported module.
            raise ErrorDuringImport(sys.modules[path].__file__, info)
        elif exc is SyntaxError:
            # A SyntaxError occurred before we could execute the module.
            raise ErrorDuringImport(value.filename, info)
        elif exc is ImportError and \
             split(lower(str(value)))[:2] == ['no', 'module']:
            # The module was not found.
            return None
        else:
            # Some other error occurred during the importing process.
            raise ErrorDuringImport(path, sys.exc_info())
    for part in split(path, '.')[1:]:
        try: module = getattr(module, part)
        except AttributeError: return None
    return module

# ---------------------------------------------------- formatter base class

class Doc:
    def document(self, object, name=None, *args):
        """Generate documentation for an object."""
        args = (object, name) + args
        # 'try' clause is to attempt to handle the possibility that inspect
        # identifies something in a way that pydoc itself has issues handling;
        # think 'super' and how it is a descriptor (which raises the exception
        # by lacking a __name__ attribute) and an instance.
        try:
            if inspect.ismodule(object): return self.docmodule(*args)
            if inspect.isclass(object): return self.docclass(*args)
            if inspect.isroutine(object): return self.docroutine(*args)
        except AttributeError:
            pass
        return self.docother(*args)

    def fail(self, object, name=None, *args):
        """Raise an exception for unimplemented types."""
        message = "don't know how to document object%s of type %s" % (
            name and ' ' + repr(name), type(object).__name__)
        raise TypeError, message

    docmodule = docclass = docroutine = docother = fail

# -------------------------------------------- HTML documentation generator

class HTMLRepr(Repr):
    """Class for safely making an HTML representation of a Python object."""
    def __init__(self):
        Repr.__init__(self)
        self.maxlist = self.maxtuple = 20
        self.maxdict = 10
        self.maxstring = self.maxother = 100

    def escape(self, text):
        return replace(text, '&', '&amp;', '<', '&lt;', '>', '&gt;')

    def repr(self, object):
        return Repr.repr(self, object)

    def repr1(self, x, level):
        if hasattr(type(x), '__name__'):
            methodname = 'repr_' + join(split(type(x).__name__), '_')
            if hasattr(self, methodname):
                return getattr(self, methodname)(x, level)
        return self.escape(cram(stripid(repr(x)), self.maxother))

    def repr_string(self, x, level):
        test = cram(x, self.maxstring)
        testrepr = repr(test)
        if '\\' in test and '\\' not in replace(testrepr, r'\\', ''):
            # Backslashes are only literal in the string and are never
            # needed to make any special characters, so show a raw string.
            return 'r' + testrepr[0] + self.escape(test) + testrepr[0]
        return re.sub(r'((\\[\\abfnrtv\'"]|\\[0-9]..|\\x..|\\u....)+)',
                      r'<font color="#c040c0">\1</font>',
                      self.escape(testrepr))

    repr_str = repr_string

    def repr_instance(self, x, level):
        try:
            return self.escape(cram(stripid(repr(x)), self.maxstring))
        except:
            return self.escape('<%s instance>' % x.__class__.__name__)

    repr_unicode = repr_string

class HTMLDoc(Doc):
    """Formatter class for HTML documentation."""

    # ------------------------------------------- HTML formatting utilities

    _repr_instance = HTMLRepr()
    repr = _repr_instance.repr
    escape = _repr_instance.escape

    def page(self, title, contents):
        """Format an HTML page."""
        return '''
<qt>
%s
</qt>'
'' % (contents)

    def heading(self, title, fgcol, bgcol, extras=''):
        """Format a page heading."""
        return '''
<h2>%s</h2>
<p>debug_Extras: %s</p>
    '
'' % (title, extras or '&nbsp;')

    def section(self, title, fgcol, bgcol, contents, width=6,
                prelude='', marginalia=None, gap='&nbsp;'):
        """Format a section with a heading."""
        if marginalia is None:
            marginalia = '<tt>' + '&nbsp;' * width + '</tt>'
        result = '''<p>
<h4>debug_Section: "%s"</h4>
'
'' % (title)
        if prelude:
            result = result + '''
<p>debug_Marginalia1: %s</p>
<p>debug_Prelude: %s</p>
'
'' % (marginalia, prelude)
        else:
            result = result + '''
<p>debug_Marginalia2: %s
'
'' % (marginalia)

        return result + '''
<p>debug_Contents: %s</p>
'
'' % contents

    def bigsection(self, title, *args):
        """Format a section with a big heading."""
        title = '''debug_Title<h7>%s</h7>''' % title
        return self.section(title, *args)

    def preformat(self, text):
        """Format literal preformatted text."""
        text = self.escape(expandtabs(text))
        return replace(text, '\n\n', '\n \n', '\n\n', '\n \n',
                             ' ', '&nbsp;', '\n', '<br>\n')

    def multicolumn(self, list, format, cols=4):
        """Format a list of items into a multi-column list."""
        result = ''
        rows = (len(list)+cols-1)/cols
        for col in range(cols):
            result = result + '<td width="%d%%" valign=top>' % (100/cols)
            for i in range(rows*col, rows*col+rows):
                if i < len(list):
                    result = result + format(list[i]) + '<br>\n'
            result = result + '</td>'
        return '<table width="100%%" summary="list"><tr>%s</tr></table>' % result

    def grey(self, text): return '<p>debug_Grey: %s</p>' % text

    def namelink(self, name, *dicts):
        """Make a link for an identifier, given name-to-URL mappings."""
        for dict in dicts:
            if name in dict:
                return '<a href="%s">%s</a>' % (dict[name], name)
        return name

    def classlink(self, object, modname):
        """Make a link for a class."""
        name, module = object.__name__, sys.modules.get(object.__module__)
        if hasattr(module, name) and getattr(module, name) is object:
            return '<a href="%s.html#%s">%s</a>' % (
                module.__name__, name, classname(object, modname))
        return classname(object, modname)

    def modulelink(self, object):
        """Make a link for a module."""
        return '<a href="%s.html">%s</a>' % (object.__name__, object.__name__)

    def modpkglink(self, (name, path, ispackage, shadowed)):
        """Make a link for a module or package to display in an index."""
        if shadowed:
            return self.grey(name)
        if path:
            url = '%s.%s.html' % (path, name)
        else:
            url = '%s.html' % name
        if ispackage:
            text = '<h7>debug_IsPackage: %s (package)</h7>' % name
        else:
            text = name
        return '<a href="%s">%s</a>' % (url, text)

    def markup(self, text, escape=None, funcs={}, classes={}, methods={}):
        """Mark up some plain text, given a context of symbols to look for.
        Each context dictionary maps object names to anchor names."""

        escape = escape or self.escape
        results = []
        here = 0
        pattern = re.compile(r'\b((http|ftp)://\S+[\w/]|'
                                r'RFC[- ]?(\d+)|'
                                r'PEP[- ]?(\d+)|'
                                r'(self\.)?(\w+))')
        while True:
            match = pattern.search(text, here)
            if not match: break
            start, end = match.span()
            results.append(escape(text[here:start]))

            all, scheme, rfc, pep, selfdot, name = match.groups()
            if scheme:
                url = escape(all).replace('"', '&quot;')
                results.append('<a href="%s">%s</a>' % (url, url))
            elif rfc:
                url = 'http://www.rfc-editor.org/rfc/rfc%d.txt' % int(rfc)
                results.append('<a href="%s">%s</a>' % (url, escape(all)))
            elif pep:
                url = 'http://www.python.org/peps/pep-%04d.html' % int(pep)
                results.append('<a href="%s">%s</a>' % (url, escape(all)))
            elif text[end:end+1] == '(':
                results.append(self.namelink(name, methods, funcs, classes))
            elif selfdot:
                results.append('self.<strong>%s</strong>' % name)
            else:
                results.append(self.namelink(name, classes))
            here = end
        results.append(escape(text[here:]))
        return join(results, '')

    # ---------------------------------------------- type-specific routines

    def formattree(self, tree, modname, parent=None):
        """Produce HTML for a class tree as given by inspect.getclasstree()."""
        result = ''
        for entry in tree:
            if type(entry) is type(()):
                c, bases = entry
                result = result + '<dt><font face="helvetica, arial">'
                result = result + self.classlink(c, modname)
                if bases and bases != (parent,):
                    parents = []
                    for base in bases:
                        parents.append(self.classlink(base, modname))
                    result = result + '(' + join(parents, ', ') + ')'
                result = result + '\n</font></dt>'
            elif type(entry) is type([]):
                result = result + '<dd>\n%s</dd>\n' % self.formattree(
                    entry, modname, c)
        return '<dl>\n%s</dl>\n' % result

    def docmodule(self, object, name=None, mod=None, *ignored):
        """Produce HTML documentation for a module object."""
        name = object.__name__ # ignore the passed-in name
        parts = split(name, '.')
        links = []
        for i in range(len(parts)-1):
            links.append(
                '<a href="%s.html"><font color="#ffffff">%s</font></a>' %
                (join(parts[:i+1], '.'), parts[i]))
        linkedname = join(links + parts[-1:], '.')
        head = '<big><big><strong>%s</strong></big></big>' % linkedname
        try:
            path = inspect.getabsfile(object)
            url = path
            if sys.platform == 'win32':
                import nturl2path
                url = nturl2path.pathname2url(path)
            filelink = '<a href="file:%s">%s</a>' % (url, path)
        except TypeError:
            filelink = '(built-in)'
        info = []
        if hasattr(object, '__version__'):
            version = str(object.__version__)
            if version[:11] == '$' + 'Revision: ' and version[-1:] == '$':
                version = strip(version[11:-1])
            info.append('version %s' % self.escape(version))
        if hasattr(object, '__date__'):
            info.append(self.escape(str(object.__date__)))
        if info:
            head = head + ' (%s)' % join(info, ', ')
        result = self.heading(
            head, '#ffffff', '#7799ee', '<a href=".">index</a><br>' + filelink)

        modules = inspect.getmembers(object, inspect.ismodule)

        classes, cdict = [], {}
        for key, value in inspect.getmembers(object, inspect.isclass):
            if (inspect.getmodule(value) or object) is object:
                if visiblename(key):
                    classes.append((key, value))
                    cdict[key] = cdict[value] = '#' + key
        for key, value in classes:
            for base in value.__bases__:
                key, modname = base.__name__, base.__module__
                module = sys.modules.get(modname)
                if modname != name and module and hasattr(module, key):
                    if getattr(module, key) is base:
                        if not key in cdict:
                            cdict[key] = cdict[base] = modname + '.html#' + key
        funcs, fdict = [], {}
        for key, value in inspect.getmembers(object, inspect.isroutine):
            if inspect.isbuiltin(value) or inspect.getmodule(value) is object:
                if visiblename(key):
                    funcs.append((key, value))
                    fdict[key] = '#-' + key
                    if inspect.isfunction(value): fdict[value] = fdict[key]
        data = []
        for key, value in inspect.getmembers(object, isdata):
            if visiblename(key):
                data.append((key, value))

        doc = self.markup(getdoc(object), self.preformat, fdict, cdict)
        doc = doc and '<tt>%s</tt>' % doc
        result = result + '<p>%s</p>\n' % doc

        if hasattr(object, '__path__'):
            modpkgs = []
            modnames = []
            for file in os.listdir(object.__path__[0]):
                path = os.path.join(object.__path__[0], file)
                modname = inspect.getmodulename(file)
                if modname != '__init__':
                    if modname and modname not in modnames:
                        modpkgs.append((modname, name, 0, 0))
                        modnames.append(modname)
                    elif ispackage(path):
                        modpkgs.append((file, name, 1, 0))
            modpkgs.sort()
            contents = self.multicolumn(modpkgs, self.modpkglink)
            result = result + self.bigsection(
                'Package Contents', '#ffffff', '#aa55cc', contents)
        elif modules:
            contents = self.multicolumn(
                modules, lambda (key, value), s=self: s.modulelink(value))
            result = result + self.bigsection(
                'Modules', '#fffff', '#aa55cc', contents)

        if classes:
            classlist = map(lambda (key, value): value, classes)
            contents = [
                self.formattree(inspect.getclasstree(classlist, 1), name)]
            for key, value in classes:
                contents.append(self.document(value, key, name, fdict, cdict))
            result = result + self.bigsection(
                'Classes', '#ffffff', '#ee77aa', join(contents))
        if funcs:
            contents = []
            for key, value in funcs:
                contents.append(self.document(value, key, name, fdict, cdict))
            result = result + self.bigsection(
                'Functions', '#ffffff', '#eeaa77', join(contents))
        if data:
            contents = []
            for key, value in data:
                contents.append(self.document(value, key))
            result = result + self.bigsection(
                'Data', '#ffffff', '#55aa55', join(contents, '<br>\n'))
        if hasattr(object, '__author__'):
            contents = self.markup(str(object.__author__), self.preformat)
            result = result + self.bigsection(
                'Author', '#ffffff', '#7799ee', contents)
        if hasattr(object, '__credits__'):
            contents = self.markup(str(object.__credits__), self.preformat)
            result = result + self.bigsection(
                'Credits', '#ffffff', '#7799ee', contents)

        return result

    def docclass(self, object, name=None, mod=None, funcs={}, classes={},
                 *ignored):
        """Produce HTML documentation for a class object."""
        realname = object.__name__
        name = name or realname
        bases = object.__bases__

        contents = []
        push = contents.append

        # Cute little class to pump out a horizontal rule between sections.
        class HorizontalRule:
            def __init__(self):
                self.needone = 0
            def maybe(self):
                if self.needone:
                    push('<hr>\n')
                self.needone = 1
        hr = HorizontalRule()

        # List the mro, if non-trivial.
        mro = list(inspect.getmro(object))
        if len(mro) > 2:
            hr.maybe()
            push('<dl><dt>Method resolution order:</dt>\n')
            for base in mro:
                push('<dd>%s</dd>\n' % self.classlink(base,
                                                      object.__module__))
            push('</dl>\n')

        def spill(msg, attrs, predicate):
            ok, attrs = _split_list(attrs, predicate)
            if ok:
                hr.maybe()
                push(msg)
                for name, kind, homecls, value in ok:
                    push(self.document(getattr(object, name), name, mod,
                                       funcs, classes, mdict, object))
                    push('\n')
            return attrs

        def spillproperties(msg, attrs, predicate):
            ok, attrs = _split_list(attrs, predicate)
            if ok:
                hr.maybe()
                push(msg)
                for name, kind, homecls, value in ok:
                    push('<dl><dt><strong>%s</strong></dt>\n' % name)
                    if value.__doc__ is not None:
                        doc = self.markup(value.__doc__, self.preformat,
                                          funcs, classes, mdict)
                        push('<dd><tt>%s</tt></dd>\n' % doc)
                    for attr, tag in [('fget', '<em>get</em>'),
                                      ('fset', '<em>set</em>'),
                                      ('fdel', '<em>delete</em>')]:
                        func = getattr(value, attr)
                        if func is not None:
                            base = self.document(func, tag, mod,
                                                 funcs, classes, mdict, object)
                            push('<dd>%s</dd>\n' % base)
                    push('</dl>\n')
            return attrs

        def spilldata(msg, attrs, predicate):
            ok, attrs = _split_list(attrs, predicate)
            if ok:
                hr.maybe()
                push(msg)
                for name, kind, homecls, value in ok:
                    base = self.docother(getattr(object, name), name, mod)
                    if callable(value) or inspect.isdatadescriptor(value):
                        doc = getattr(value, "__doc__", None)
                    else:
                        doc = None
                    if doc is None:
                        push('<dl><dt>%s</dl>\n' % base)
                    else:
                        doc = self.markup(getdoc(value), self.preformat,
                                          funcs, classes, mdict)
                        doc = '<dd><tt>%s</tt>' % doc
                        push('<dl><dt>%s%s</dl>\n' % (base, doc))
                    push('\n')
            return attrs

        attrs = filter(lambda (name, kind, cls, value): visiblename(name),
                       inspect.classify_class_attrs(object))
        mdict = {}
        for key, kind, homecls, value in attrs:
            mdict[key] = anchor = '#' + name + '-' + key
            value = getattr(object, key)
            try:
                # The value may not be hashable (e.g., a data attr with
                # a dict or list value).
                mdict[value] = anchor
            except TypeError:
                pass

        while attrs:
            if mro:
                thisclass = mro.pop(0)
            else:
                thisclass = attrs[0][2]
            attrs, inherited = _split_list(attrs, lambda t: t[2] is thisclass)

            if thisclass is __builtin__.object:
                attrs = inherited
                continue
            elif thisclass is object:
                tag = 'defined here'
            else:
                tag = 'inherited from %s' % self.classlink(thisclass,
                                                           object.__module__)
            tag += ':<br>\n'

            # Sort attrs by name.
            attrs.sort(lambda t1, t2: cmp(t1[0], t2[0]))

            # Pump out the attrs, segregated by kind.
            attrs = spill('Methods %s' % tag, attrs,
                          lambda t: t[1] == 'method')
            attrs = spill('Class methods %s' % tag, attrs,
                          lambda t: t[1] == 'class method')
            attrs = spill('Static methods %s' % tag, attrs,
                          lambda t: t[1] == 'static method')
            attrs = spillproperties('Properties %s' % tag, attrs,
                                    lambda t: t[1] == 'property')
            attrs = spilldata('Data and other attributes %s' % tag, attrs,
                              lambda t: t[1] == 'data')
            assert attrs == []
            attrs = inherited

        contents = ''.join(contents)

        if name == realname:
            title = '<a name="%s">class <strong>%s</strong></a>' % (
                name, realname)
        else:
            title = '<strong>%s</strong> = <a name="%s">class %s</a>' % (
                name, name, realname)
        if bases:
            parents = []
            for base in bases:
                parents.append(self.classlink(base, object.__module__))
            title = title + '(%s)' % join(parents, ', ')
        doc = self.markup(getdoc(object), self.preformat, funcs, classes, mdict)
        doc = doc and '<tt>%s<br>&nbsp;</tt>' % doc

        return self.section(title, '#000000', '#ffc8d8', contents, 3, doc)

    def formatvalue(self, object):
        """Format an argument default value as text."""
        return self.grey('=' + self.repr(object))

    def docroutine(self, object, name=None, mod=None,
                   funcs={}, classes={}, methods={}, cl=None):
        """Produce HTML documentation for a function or method object."""
        realname = object.__name__
        name = name or realname
        anchor = (cl and cl.__name__ or '') + '-' + name
        note = ''
        skipdocs = 0
        if inspect.ismethod(object):
            imclass = object.im_class
            if cl:
                if imclass is not cl:
                    note = ' from ' + self.classlink(imclass, mod)
            else:
                if object.im_self:
                    note = ' method of %s instance' % self.classlink(
                        object.im_self.__class__, mod)
                else:
                    note = ' unbound %s method' % self.classlink(imclass,mod)
            object = object.im_func

        if name == realname:
            title = '<a name="%s"><strong>%s</strong></a>' % (anchor, realname)
        else:
            if (cl and realname in cl.__dict__ and
                cl.__dict__[realname] is object):
                reallink = '<a href="#%s">%s</a>' % (
                    cl.__name__ + '-' + realname, realname)
                skipdocs = 1
            else:
                reallink = realname
            title = '<a name="%s"><strong>%s</strong></a> = %s' % (
                anchor, name, reallink)
        if inspect.isfunction(object):
            args, varargs, varkw, defaults = inspect.getargspec(object)
            argspec = inspect.formatargspec(
                args, varargs, varkw, defaults, formatvalue=self.formatvalue)
            if realname == '<lambda>':
                title = '<strong>%s</strong> <em>lambda</em> ' % name
                argspec = argspec[1:-1] # remove parentheses
        else:
            argspec = '(...)'

        decl = title + argspec + (note and self.grey(
               '<font face="helvetica, arial">%s</font>' % note))

        if skipdocs:
            return '<dl><dt>%s</dt></dl>\n' % decl
        else:
            doc = self.markup(
                getdoc(object), self.preformat, funcs, classes, methods)
            doc = doc and '<dd><tt>%s</tt></dd>' % doc
            return '<dl><dt>%s</dt>%s</dl>\n' % (decl, doc)

    def docother(self, object, name=None, mod=None, *ignored):
        """Produce HTML documentation for a data object."""
        lhs = name and '<strong>%s</strong> = ' % name or ''
        return lhs + self.repr(object)

    def index(self, dir, shadowed=None):
        """Generate an HTML index for a directory of modules."""
        modpkgs = []
        if shadowed is None: shadowed = {}
        seen = {}
        files = os.listdir(dir)

        def found(name, ispackage,
                  modpkgs=modpkgs, shadowed=shadowed, seen=seen):
            if name not in seen:
                modpkgs.append((name, '', ispackage, name in shadowed))
                seen[name] = 1
                shadowed[name] = 1

        # Package spam/__init__.py takes precedence over module spam.py.
        for file in files:
            path = os.path.join(dir, file)
            if ispackage(path): found(file, 1)
        for file in files:
            path = os.path.join(dir, file)
            if os.path.isfile(path):
                modname = inspect.getmodulename(file)
                if modname: found(modname, 0)

        modpkgs.sort()
        contents = self.multicolumn(modpkgs, self.modpkglink)
        return self.bigsection(dir, '#ffffff', '#ee77aa', contents)

# -------------------------------------------- text documentation generator

class TextRepr(Repr):
    """Class for safely making a text representation of a Python object."""
    def __init__(self):
        Repr.__init__(self)
        self.maxlist = self.maxtuple = 20
        self.maxdict = 10
        self.maxstring = self.maxother = 100

    def repr1(self, x, level):
        if hasattr(type(x), '__name__'):
            methodname = 'repr_' + join(split(type(x).__name__), '_')
            if hasattr(self, methodname):
                return getattr(self, methodname)(x, level)
        return cram(stripid(repr(x)), self.maxother)

    def repr_string(self, x, level):
        test = cram(x, self.maxstring)
        testrepr = repr(test)
        if '\\' in test and '\\' not in replace(testrepr, r'\\', ''):
            # Backslashes are only literal in the string and are never
            # needed to make any special characters, so show a raw string.
            return 'r' + testrepr[0] + test + testrepr[0]
        return testrepr

    repr_str = repr_string

    def repr_instance(self, x, level):
        try:
            return cram(stripid(repr(x)), self.maxstring)
        except:
            return '<%s instance>' % x.__class__.__name__

class TextDoc(Doc):
    """Formatter class for text documentation."""

    # ------------------------------------------- text formatting utilities

    _repr_instance = TextRepr()
    repr = _repr_instance.repr

    def bold(self, text):
        """Format a string in bold by overstriking."""
        return join(map(lambda ch: ch + '\b' + ch, text), '')

    def indent(self, text, prefix='    '):
        """Indent text by prepending a given prefix to each line."""
        if not text: return ''
        lines = split(text, '\n')
        lines = map(lambda line, prefix=prefix: prefix + line, lines)
        if lines: lines[-1] = rstrip(lines[-1])
        return join(lines, '\n')

    def section(self, title, contents):
        """Format a section with a given heading."""
        return self.bold(title) + '\n' + rstrip(self.indent(contents)) + '\n\n'

    # ---------------------------------------------- type-specific routines

    def formattree(self, tree, modname, parent=None, prefix=''):
        """Render in text a class tree as returned by inspect.getclasstree()."""
        result = ''
        for entry in tree:
            if type(entry) is type(()):
                c, bases = entry
                result = result + prefix + classname(c, modname)
                if bases and bases != (parent,):
                    parents = map(lambda c, m=modname: classname(c, m), bases)
                    result = result + '(%s)' % join(parents, ', ')
                result = result + '\n'
            elif type(entry) is type([]):
                result = result + self.formattree(
                    entry, modname, c, prefix + '    ')
        return result

    def docmodule(self, object, name=None, mod=None):
        """Produce text documentation for a given module object."""
        name = object.__name__ # ignore the passed-in name
        synop, desc = splitdoc(getdoc(object))
        result = self.section('NAME', name + (synop and ' - ' + synop))

        try:
            file = inspect.getabsfile(object)
        except TypeError:
            file = '(built-in)'
        result = result + self.section('FILE', file)
        if desc:
            result = result + self.section('DESCRIPTION', desc)

        classes = []
        for key, value in inspect.getmembers(object, inspect.isclass):
            if (inspect.getmodule(value) or object) is object:
                if visiblename(key):
                    classes.append((key, value))
        funcs = []
        for key, value in inspect.getmembers(object, inspect.isroutine):
            if inspect.isbuiltin(value) or inspect.getmodule(value) is object:
                if visiblename(key):
                    funcs.append((key, value))
        data = []
        for key, value in inspect.getmembers(object, isdata):
            if visiblename(key):
                data.append((key, value))

        if hasattr(object, '__path__'):
            modpkgs = []
            for file in os.listdir(object.__path__[0]):
                path = os.path.join(object.__path__[0], file)
                modname = inspect.getmodulename(file)
                if modname != '__init__':
                    if modname and modname not in modpkgs:
                        modpkgs.append(modname)
                    elif ispackage(path):
                        modpkgs.append(file + ' (package)')
            modpkgs.sort()
            result = result + self.section(
                'PACKAGE CONTENTS', join(modpkgs, '\n'))

        if classes:
            classlist = map(lambda (key, value): value, classes)
            contents = [self.formattree(
                inspect.getclasstree(classlist, 1), name)]
            for key, value in classes:
                contents.append(self.document(value, key, name))
            result = result + self.section('CLASSES', join(contents, '\n'))

        if funcs:
            contents = []
            for key, value in funcs:
                contents.append(self.document(value, key, name))
            result = result + self.section('FUNCTIONS', join(contents, '\n'))

        if data:
            contents = []
            for key, value in data:
                contents.append(self.docother(value, key, name, 70))
            result = result + self.section('DATA', join(contents, '\n'))

        if hasattr(object, '__version__'):
            version = str(object.__version__)
            if version[:11] == '$' + 'Revision: ' and version[-1:] == '$':
                version = strip(version[11:-1])
            result = result + self.section('VERSION', version)
        if hasattr(object, '__date__'):
            result = result + self.section('DATE', str(object.__date__))
        if hasattr(object, '__author__'):
            result = result + self.section('AUTHOR', str(object.__author__))
        if hasattr(object, '__credits__'):
            result = result + self.section('CREDITS', str(object.__credits__))
        return result

    def docclass(self, object, name=None, mod=None):
        """Produce text documentation for a given class object."""
        realname = object.__name__
        name = name or realname
        bases = object.__bases__

        def makename(c, m=object.__module__):
            return classname(c, m)

        if name == realname:
            title = 'class ' + self.bold(realname)
        else:
            title = self.bold(name) + ' = class ' + realname
        if bases:
            parents = map(makename, bases)
            title = title + '(%s)' % join(parents, ', ')

        doc = getdoc(object)
        contents = doc and [doc + '\n'] or []
        push = contents.append

        # List the mro, if non-trivial.
        mro = list(inspect.getmro(object))
        if len(mro) > 2:
            push("Method resolution order:")
            for base in mro:
                push('    ' + makename(base))
            push('')

        # Cute little class to pump out a horizontal rule between sections.
        class HorizontalRule:
            def __init__(self):
                self.needone = 0
            def maybe(self):
                if self.needone:
                    push('-' * 70)
                self.needone = 1
        hr = HorizontalRule()

        def spill(msg, attrs, predicate):
            ok, attrs = _split_list(attrs, predicate)
            if ok:
                hr.maybe()
                push(msg)
                for name, kind, homecls, value in ok:
                    push(self.document(getattr(object, name),
                                       name, mod, object))
            return attrs

        def spillproperties(msg, attrs, predicate):
            ok, attrs = _split_list(attrs, predicate)
            if ok:
                hr.maybe()
                push(msg)
                for name, kind, homecls, value in ok:
                    push(name)
                    need_blank_after_doc = 0
                    doc = getdoc(value) or ''
                    if doc:
                        push(self.indent(doc))
                        need_blank_after_doc = 1
                    for attr, tag in [('fget', '<get>'),
                                      ('fset', '<set>'),
                                      ('fdel', '<delete>')]:
                        func = getattr(value, attr)
                        if func is not None:
                            if need_blank_after_doc:
                                push('')
                                need_blank_after_doc = 0
                            base = self.document(func, tag, mod)
                            push(self.indent(base))
            return attrs

        def spilldata(msg, attrs, predicate):
            ok, attrs = _split_list(attrs, predicate)
            if ok:
                hr.maybe()
                push(msg)
                for name, kind, homecls, value in ok:
                    if callable(value) or inspect.isdatadescriptor(value):
                        doc = getattr(value, "__doc__", None)
                    else:
                        doc = None
                    push(self.docother(getattr(object, name),
                                       name, mod, 70, doc) + '\n')
            return attrs

        attrs = filter(lambda (name, kind, cls, value): visiblename(name),
                       inspect.classify_class_attrs(object))
        while attrs:
            if mro:
                thisclass = mro.pop(0)
            else:
                thisclass = attrs[0][2]
            attrs, inherited = _split_list(attrs, lambda t: t[2] is thisclass)

            if thisclass is __builtin__.object:
                attrs = inherited
                continue
            elif thisclass is object:
                tag = "defined here"
            else:
                tag = "inherited from %s" % classname(thisclass,
                                                      object.__module__)
            filter(lambda t: not t[0].startswith('_'), attrs)

            # Sort attrs by name.
            attrs.sort()

            # Pump out the attrs, segregated by kind.
            attrs = spill("Methods %s:\n" % tag, attrs,
                          lambda t: t[1] == 'method')
            attrs = spill("Class methods %s:\n" % tag, attrs,
                          lambda t: t[1] == 'class method')
            attrs = spill("Static methods %s:\n" % tag, attrs,
                          lambda t: t[1] == 'static method')
            attrs = spillproperties("Properties %s:\n" % tag, attrs,
                                    lambda t: t[1] == 'property')
            attrs = spilldata("Data and other attributes %s:\n" % tag, attrs,
                              lambda t: t[1] == 'data')
            assert attrs == []
            attrs = inherited

        contents = '\n'.join(contents)
        if not contents:
            return title + '\n'
        return title + '\n' + self.indent(rstrip(contents), ' |  ') + '\n'

    def formatvalue(self, object):
        """Format an argument default value as text."""
        return '=' + self.repr(object)

    def docroutine(self, object, name=None, mod=None, cl=None):
        """Produce text documentation for a function or method object."""
        realname = object.__name__
        name = name or realname
        note = ''
        skipdocs = 0
        if inspect.ismethod(object):
            imclass = object.im_class
            if cl:
                if imclass is not cl:
                    note = ' from ' + classname(imclass, mod)
            else:
                if object.im_self:
                    note = ' method of %s instance' % classname(
                        object.im_self.__class__, mod)
                else:
                    note = ' unbound %s method' % classname(imclass,mod)
            object = object.im_func

        if name == realname:
            title = self.bold(realname)
        else:
            if (cl and realname in cl.__dict__ and
                cl.__dict__[realname] is object):
                skipdocs = 1
            title = self.bold(name) + ' = ' + realname
        if inspect.isfunction(object):
            args, varargs, varkw, defaults = inspect.getargspec(object)
            argspec = inspect.formatargspec(
                args, varargs, varkw, defaults, formatvalue=self.formatvalue)
            if realname == '<lambda>':
                title = 'lambda'
                argspec = argspec[1:-1] # remove parentheses
        else:
            argspec = '(...)'
        decl = title + argspec + note

        if skipdocs:
            return decl + '\n'
        else:
            doc = getdoc(object) or ''
            return decl + '\n' + (doc and rstrip(self.indent(doc)) + '\n')

    def docother(self, object, name=None, mod=None, maxlen=None, doc=None):
        """Produce text documentation for a data object."""
        repr = self.repr(object)
        if maxlen:
            line = (name and name + ' = ' or '') + repr
            chop = maxlen - len(line)
            if chop < 0: repr = repr[:chop] + '...'
        line = (name and self.bold(name) + ' = ' or '') + repr
        if doc is not None:
            line += '\n' + self.indent(str(doc))
        return line

# --------------------------------------------------------- user interfaces

def pager(text):
    """The first time this is called, determine what kind of pager to use."""
    global pager
    pager = getpager()
    pager(text)

def getpager():
    """Decide what method to use for paging through text."""
    if type(sys.stdout) is not types.FileType:
        return plainpager
    if not sys.stdin.isatty() or not sys.stdout.isatty():
        return plainpager
    if os.environ.get('TERM') in ['dumb', 'emacs']:
        return plainpager
    if 'PAGER' in os.environ:
        if sys.platform == 'win32': # pipes completely broken in Windows
            return lambda text: tempfilepager(plain(text), os.environ['PAGER'])
        elif os.environ.get('TERM') in ['dumb', 'emacs']:
            return lambda text: pipepager(plain(text), os.environ['PAGER'])
        else:
            return lambda text: pipepager(text, os.environ['PAGER'])
    if sys.platform == 'win32' or sys.platform.startswith('os2'):
        return lambda text: tempfilepager(plain(text), 'more <')
    if hasattr(os, 'system') and os.system('(less) 2>/dev/null') == 0:
        return lambda text: pipepager(text, 'less')

    import tempfile
    (fd, filename) = tempfile.mkstemp()
    os.close(fd)
    try:
        if hasattr(os, 'system') and os.system('more %s' % filename) == 0:
            return lambda text: pipepager(text, 'more')
        else:
            return ttypager
    finally:
        os.unlink(filename)

def plain(text):
    """Remove boldface formatting from text."""
    return re.sub('.\b', '', text)

def pipepager(text, cmd):
    """Page through text by feeding it to another program."""
    pipe = os.popen(cmd, 'w')
    try:
        pipe.write(text)
        pipe.close()
    except IOError:
        pass # Ignore broken pipes caused by quitting the pager program.

def tempfilepager(text, cmd):
    """Page through text by invoking a program on a temporary file."""
    import tempfile
    filename = tempfile.mktemp()
    file = open(filename, 'w')
    file.write(text)
    file.close()
    try:
        os.system(cmd + ' ' + filename)
    finally:
        os.unlink(filename)

def ttypager(text):
    """Page through text on a text terminal."""
    lines = split(plain(text), '\n')
    try:
        import tty
        fd = sys.stdin.fileno()
        old = tty.tcgetattr(fd)
        tty.setcbreak(fd)
        getchar = lambda: sys.stdin.read(1)
    except (ImportError, AttributeError):
        tty = None
        getchar = lambda: sys.stdin.readline()[:-1][:1]

    try:
        r = inc = os.environ.get('LINES', 25) - 1
        sys.stdout.write(join(lines[:inc], '\n') + '\n')
        while lines[r:]:
            sys.stdout.write('-- more --')
            sys.stdout.flush()
            c = getchar()

            if c in ['q', 'Q']:
                sys.stdout.write('\r          \r')
                break
            elif c in ['\r', '\n']:
                sys.stdout.write('\r          \r' + lines[r] + '\n')
                r = r + 1
                continue
            if c in ['b', 'B', '\x1b']:
                r = r - inc - inc
                if r < 0: r = 0
            sys.stdout.write('\n' + join(lines[r:r+inc], '\n') + '\n')
            r = r + inc

    finally:
        if tty:
            tty.tcsetattr(fd, tty.TCSAFLUSH, old)

def plainpager(text):
    """Simply print unformatted text.  This is the ultimate fallback."""
    sys.stdout.write(plain(text))

def describe(thing):
    """Produce a short description of the given thing."""
    if inspect.ismodule(thing):
        if thing.__name__ in sys.builtin_module_names:
            return 'built-in module ' + thing.__name__
        if hasattr(thing, '__path__'):
            return 'package ' + thing.__name__
        else:
            return 'module ' + thing.__name__
    if inspect.isbuiltin(thing):
        return 'built-in function ' + thing.__name__
    if inspect.isclass(thing):
        return 'class ' + thing.__name__
    if inspect.isfunction(thing):
        return 'function ' + thing.__name__
    if inspect.ismethod(thing):
        return 'method ' + thing.__name__
    if type(thing) is types.InstanceType:
        return 'instance of ' + thing.__class__.__name__
    return type(thing).__name__

def locate(path, forceload=0):
    """Locate an object by name or dotted path, importing as necessary."""
    parts = [part for part in split(path, '.') if part]
    module, n = None, 0
    while n < len(parts):
        nextmodule = safeimport(join(parts[:n+1], '.'), forceload)
        if nextmodule: module, n = nextmodule, n + 1
        else: break
    if module:
        object = module
        for part in parts[n:]:
            try: object = getattr(object, part)
            except AttributeError: return None
        return object
    else:
        if hasattr(__builtin__, path):
            return getattr(__builtin__, path)

# --------------------------------------- interactive interpreter interface

text = TextDoc()
html = HTMLDoc()

def resolve(thing, forceload=0):
    """Given an object or a path to an object, get the object and its name."""
    if isinstance(thing, str):
        object = locate(thing, forceload)
        if not object:
            raise ImportError, 'no Python documentation found for %r' % thing
        return object, thing
    else:
        return thing, getattr(thing, '__name__', None)

def doc(thing, title='Python Library Documentation: %s', forceload=0):
    """Display text documentation, given an object or a path to an object."""
    try:
        object, name = resolve(thing, forceload)
        desc = describe(object)
        module = inspect.getmodule(object)
        if name and '.' in name:
            desc += ' in ' + name[:name.rfind('.')]
        elif module and module is not object:
            desc += ' in module ' + module.__name__
        pager(title % desc + '\n\n' + text.document(object, name))
    except (ImportError, ErrorDuringImport), value:
        print value

def writedoc(thing, forceload=0):
    """Write HTML documentation to a file in the current directory."""
    try:
        object, name = resolve(thing, forceload)
        page = html.page(describe(object), html.document(object, name))
        file = open(name + '.html', 'w')
        file.write(page)
        file.close()
        print 'wrote', name + '.html'
    except (ImportError, ErrorDuringImport), value:
        print value

def writedocs(dir, pkgpath='', done=None):
    """Write out HTML documentation for all modules in a directory tree."""
    if done is None: done = {}
    for file in os.listdir(dir):
        path = os.path.join(dir, file)
        if ispackage(path):
            writedocs(path, pkgpath + file + '.', done)
        elif os.path.isfile(path):
            modname = inspect.getmodulename(path)
            if modname:
                if modname == '__init__':
                    modname = pkgpath[:-1] # remove trailing period
                else:
                    modname = pkgpath + modname
                if modname not in done:
                    done[modname] = 1
                    writedoc(modname)

class Helper:
    keywords = {
        'and': 'BOOLEAN',
        'assert': ('ref/assert', ''),
        'break': ('ref/break', 'while for'),
        'class': ('ref/class', 'CLASSES SPECIALMETHODS'),
        'continue': ('ref/continue', 'while for'),
        'def': ('ref/function', ''),
        'del': ('ref/del', 'BASICMETHODS'),
        'elif': 'if',
        'else': ('ref/if', 'while for'),
        'except': 'try',
        'exec': ('ref/exec', ''),
        'finally': 'try',
        'for': ('ref/for', 'break continue while'),
        'from': 'import',
        'global': ('ref/global', 'NAMESPACES'),
        'if': ('ref/if', 'TRUTHVALUE'),
        'import': ('ref/import', 'MODULES'),
        'in': ('ref/comparisons', 'SEQUENCEMETHODS2'),
        'is': 'COMPARISON',
        'lambda': ('ref/lambdas', 'FUNCTIONS'),
        'not': 'BOOLEAN',
        'or': 'BOOLEAN',
        'pass': ('ref/pass', ''),
        'print': ('ref/print', ''),
        'raise': ('ref/raise', 'EXCEPTIONS'),
        'return': ('ref/return', 'FUNCTIONS'),
        'try': ('ref/try', 'EXCEPTIONS'),
        'while': ('ref/while', 'break continue if TRUTHVALUE'),
        'yield': ('ref/yield', ''),
    }

    topics = {
        'TYPES': ('ref/types', 'STRINGS UNICODE NUMBERS SEQUENCES MAPPINGS FUNCTIONS CLASSES MODULES FILES inspect'),
        'STRINGS': ('ref/strings', 'str UNICODE SEQUENCES STRINGMETHODS FORMATTING TYPES'),
        'STRINGMETHODS': ('lib/string-methods', 'STRINGS FORMATTING'),
        'FORMATTING': ('lib/typesseq-strings', 'OPERATORS'),
        'UNICODE': ('ref/strings', 'encodings unicode SEQUENCES STRINGMETHODS FORMATTING TYPES'),
        'NUMBERS': ('ref/numbers', 'INTEGER FLOAT COMPLEX TYPES'),
        'INTEGER': ('ref/integers', 'int range'),
        'FLOAT': ('ref/floating', 'float math'),
        'COMPLEX': ('ref/imaginary', 'complex cmath'),
        'SEQUENCES': ('lib/typesseq', 'STRINGMETHODS FORMATTING xrange LISTS'),
        'MAPPINGS': 'DICTIONARIES',
        'FUNCTIONS': ('lib/typesfunctions', 'def TYPES'),
        'METHODS': ('lib/typesmethods', 'class def CLASSES TYPES'),
        'CODEOBJECTS': ('lib/bltin-code-objects', 'compile FUNCTIONS TYPES'),
        'TYPEOBJECTS': ('lib/bltin-type-objects', 'types TYPES'),
        'FRAMEOBJECTS': 'TYPES',
        'TRACEBACKS': 'TYPES',
        'NONE': ('lib/bltin-null-object', ''),
        'ELLIPSIS': ('lib/bltin-ellipsis-object', 'SLICINGS'),
        'FILES': ('lib/bltin-file-objects', ''),
        'SPECIALATTRIBUTES': ('lib/specialattrs', ''),
        'CLASSES': ('ref/types', 'class SPECIALMETHODS PRIVATENAMES'),
        'MODULES': ('lib/typesmodules', 'import'),
        'PACKAGES': 'import',
        'EXPRESSIONS': ('ref/summary', 'lambda or and not in is BOOLEAN COMPARISON BITWISE SHIFTING BINARY FORMATTING POWER UNARY ATTRIBUTES SUBSCRIPTS SLICINGS CALLS TUPLES LISTS DICTIONARIES BACKQUOTES'),
        'OPERATORS': 'EXPRESSIONS',
        'PRECEDENCE': 'EXPRESSIONS',
        'OBJECTS': ('ref/objects', 'TYPES'),
        'SPECIALMETHODS': ('ref/specialnames', 'BASICMETHODS ATTRIBUTEMETHODS CALLABLEMETHODS SEQUENCEMETHODS1 MAPPINGMETHODS SEQUENCEMETHODS2 NUMBERMETHODS CLASSES'),
        'BASICMETHODS': ('ref/customization', 'cmp hash repr str SPECIALMETHODS'),
        'ATTRIBUTEMETHODS': ('ref/attribute-access', 'ATTRIBUTES SPECIALMETHODS'),
        'CALLABLEMETHODS': ('ref/callable-types', 'CALLS SPECIALMETHODS'),
        'SEQUENCEMETHODS1': ('ref/sequence-types', 'SEQUENCES SEQUENCEMETHODS2 SPECIALMETHODS'),
        'SEQUENCEMETHODS2': ('ref/sequence-methods', 'SEQUENCES SEQUENCEMETHODS1 SPECIALMETHODS'),
        'MAPPINGMETHODS': ('ref/sequence-types', 'MAPPINGS SPECIALMETHODS'),
        'NUMBERMETHODS': ('ref/numeric-types', 'NUMBERS AUGMENTEDASSIGNMENT SPECIALMETHODS'),
        'EXECUTION': ('ref/execmodel', 'NAMESPACES DYNAMICFEATURES EXCEPTIONS'),
        'NAMESPACES': ('ref/naming', 'global ASSIGNMENT DELETION DYNAMICFEATURES'),
        'DYNAMICFEATURES': ('ref/dynamic-features', ''),
        'SCOPING': 'NAMESPACES',
        'FRAMES': 'NAMESPACES',
        'EXCEPTIONS': ('ref/exceptions', 'try except finally raise'),
        'COERCIONS': ('ref/coercion-rules','CONVERSIONS'),
        'CONVERSIONS': ('ref/conversions', 'COERCIONS'),
        'IDENTIFIERS': ('ref/identifiers', 'keywords SPECIALIDENTIFIERS'),
        'SPECIALIDENTIFIERS': ('ref/id-classes', ''),
        'PRIVATENAMES': ('ref/atom-identifiers', ''),
        'LITERALS': ('ref/atom-literals', 'STRINGS BACKQUOTES NUMBERS TUPLELITERALS LISTLITERALS DICTIONARYLITERALS'),
        'TUPLES': 'SEQUENCES',
        'TUPLELITERALS': ('ref/exprlists', 'TUPLES LITERALS'),
        'LISTS': ('lib/typesseq-mutable', 'LISTLITERALS'),
        'LISTLITERALS': ('ref/lists', 'LISTS LITERALS'),
        'DICTIONARIES': ('lib/typesmapping', 'DICTIONARYLITERALS'),
        'DICTIONARYLITERALS': ('ref/dict', 'DICTIONARIES LITERALS'),
        'BACKQUOTES': ('ref/string-conversions', 'repr str STRINGS LITERALS'),
        'ATTRIBUTES': ('ref/attribute-references', 'getattr hasattr setattr ATTRIBUTEMETHODS'),
        'SUBSCRIPTS': ('ref/subscriptions', 'SEQUENCEMETHODS1'),
        'SLICINGS': ('ref/slicings', 'SEQUENCEMETHODS2'),
        'CALLS': ('ref/calls', 'EXPRESSIONS'),
        'POWER': ('ref/power', 'EXPRESSIONS'),
        'UNARY': ('ref/unary', 'EXPRESSIONS'),
        'BINARY': ('ref/binary', 'EXPRESSIONS'),
        'SHIFTING': ('ref/shifting', 'EXPRESSIONS'),
        'BITWISE': ('ref/bitwise', 'EXPRESSIONS'),
        'COMPARISON': ('ref/comparisons', 'EXPRESSIONS BASICMETHODS'),
        'BOOLEAN': ('ref/Booleans', 'EXPRESSIONS TRUTHVALUE'),
        'ASSERTION': 'assert',
        'ASSIGNMENT': ('ref/assignment', 'AUGMENTEDASSIGNMENT'),
        'AUGMENTEDASSIGNMENT': ('ref/augassign', 'NUMBERMETHODS'),
        'DELETION': 'del',
        'PRINTING': 'print',
        'RETURNING': 'return',
        'IMPORTING': 'import',
        'CONDITIONAL': 'if',
        'LOOPING': ('ref/compound', 'for while break continue'),
        'TRUTHVALUE': ('lib/truth', 'if while and or not BASICMETHODS'),
        'DEBUGGING': ('lib/module-pdb', 'pdb'),
    }

    def __init__(self, input, output):
        self.input = input
        self.output = output
        self.docdir = None
        execdir = os.path.dirname(sys.executable)
        homedir = os.environ.get('PYTHONHOME')
        for dir in [os.environ.get('PYTHONDOCS'),
                    homedir and os.path.join(homedir, 'doc'),
                    os.path.join(execdir, 'doc'),
                    '/usr/doc/python-docs-' + split(sys.version)[0],
                    '/usr/doc/python-' + split(sys.version)[0],
                    '/usr/doc/python-docs-' + sys.version[:3],
                    '/usr/doc/python-' + sys.version[:3],
                    os.path.join(sys.prefix, 'Resources/English.lproj/Documentation')]:
            if dir and os.path.isdir(os.path.join(dir, 'lib')):
                self.docdir = dir

    def __repr__(self):
        if inspect.stack()[1][3] == '?':
            self()
            return ''
        return '<pydoc.Helper instance>'

    def __call__(self, request=None):
        if request is not None:
            self.help(request)
        else:
            self.intro()
            self.interact()
            self.output.write('''
You are now leaving help and returning to the Python interpreter.
If you want to ask for help on a particular object directly from the
interpreter, you can type "help(object)".  Executing "help('
string')"
has the same effect as typing a particular string at the help> prompt.
'
'')

    def interact(self):
        self.output.write('\n')
        while True:
            self.output.write('help> ')
            self.output.flush()
            try:
                request = self.input.readline()
                if not request: break
            except KeyboardInterrupt: break
            request = strip(replace(request, '"', '', "'", ''))
            if lower(request) in ['q', 'quit']: break
            self.help(request)

    def help(self, request):
        if type(request) is type(''):
            if request == 'help': self.intro()
            elif request == 'keywords': self.listkeywords()
            elif request == 'topics': self.listtopics()
            elif request == 'modules': self.listmodules()
            elif request[:8] == 'modules ':
                self.listmodules(split(request)[1])
            elif request in self.keywords: self.showtopic(request)
            elif request in self.topics: self.showtopic(request)
            elif request: doc(request, 'Help on %s:')
        elif isinstance(request, Helper): self()
        else: doc(request, 'Help on %s:')
        self.output.write('\n')

    def intro(self):
        self.output.write('''
Welcome to Python %s!  This is the online help utility.

If this is your first time using Python, you should definitely check out
the tutorial on the Internet at http://www.python.org/doc/tut/.

Enter the name of any module, keyword, or topic to get help on writing
Python programs and using Python modules.  To quit this help utility and
return to the interpreter, just type "quit".

To get a list of available modules, keywords, or topics, type "modules",
"keywords", or "topics".  Each module also comes with a one-line summary
of what it does; to list the modules whose summaries contain a given word
such as "spam", type "modules spam".
'
'' % sys.version[:3])

    def list(self, items, columns=4, width=80):
        items = items[:]
        items.sort()
        colw = width / columns
        rows = (len(items) + columns - 1) / columns
        for row in range(rows):
            for col in range(columns):
                i = col * rows + row
                if i < len(items):
                    self.output.write(items[i])
                    if col < columns - 1:
                        self.output.write(' ' + ' ' * (colw-1 - len(items[i])))
            self.output.write('\n')

    def listkeywords(self):
        self.output.write('''
Here is a list of the Python keywords.  Enter any keyword to get more help.

'
'')
        self.list(self.keywords.keys())

    def listtopics(self):
        self.output.write('''
Here is a list of available topics.  Enter any topic name to get more help.

'
'')
        self.list(self.topics.keys())

    def showtopic(self, topic):
        if not self.docdir:
            self.output.write('''
Sorry, topic and keyword documentation is not available because the Python
HTML documentation files could not be found.  If you have installed them,
please set the environment variable PYTHONDOCS to indicate their location.
'
'')
            return
        target = self.topics.get(topic, self.keywords.get(topic))
        if not target:
            self.output.write('no documentation found for %s\n' % repr(topic))
            return
        if type(target) is type(''):
            return self.showtopic(target)

        filename, xrefs = target
        filename = self.docdir + '/' + filename + '.html'
        try:
            file = open(filename)
        except:
            self.output.write('could not read docs from %s\n' % filename)
            return

        divpat = re.compile('<div[^>]*navigat.*?</div.*?>', re.I | re.S)
        addrpat = re.compile('<address.*?>.*?</address.*?>', re.I | re.S)
        document = re.sub(addrpat, '', re.sub(divpat, '', file.read()))
        file.close()

        import htmllib, formatter, StringIO
        buffer = StringIO.StringIO()
        parser = htmllib.HTMLParser(
            formatter.AbstractFormatter(formatter.DumbWriter(buffer)))
        parser.start_table = parser.do_p
        parser.end_table = lambda parser=parser: parser.do_p({})
        parser.start_tr = parser.do_br
        parser.start_td = parser.start_th = lambda a, b=buffer: b.write('\t')
        parser.feed(document)
        buffer = replace(buffer.getvalue(), '\xa0', ' ', '\n', '\n  ')
        pager('  ' + strip(buffer) + '\n')
        if xrefs:
            buffer = StringIO.StringIO()
            formatter.DumbWriter(buffer).send_flowing_data(
                'Related help topics: ' + join(split(xrefs), ', ') + '\n')
            self.output.write('\n%s\n' % buffer.getvalue())

    def listmodules(self, key=''):
        if key:
            self.output.write('''
Here is a list of matching modules.  Enter any module name to get more help.

'
'')
            apropos(key)
        else:
            self.output.write('''
Please wait a moment while I gather a list of all available modules...

'
'')
            modules = {}
            def callback(path, modname, desc, modules=modules):
                if modname and modname[-9:] == '.__init__':
                    modname = modname[:-9] + ' (package)'
                if find(modname, '.') < 0:
                    modules[modname] = 1
            ModuleScanner().run(callback)
            self.list(modules.keys())
            self.output.write('''
Enter any module name to get more help.  Or, type "modules spam" to search
for modules whose descriptions contain the word "spam".
'
'')

help = Helper(sys.stdin, sys.stdout)

class Scanner:
    """A generic tree iterator."""
    def __init__(self, roots, children, descendp):
        self.roots = roots[:]
        self.state = []
        self.children = children
        self.descendp = descendp

    def next(self):
        if not self.state:
            if not self.roots:
                return None
            root = self.roots.pop(0)
            self.state = [(root, self.children(root))]
        node, children = self.state[-1]
        if not children:
            self.state.pop()
            return self.next()
        child = children.pop(0)
        if self.descendp(child):
            self.state.append((child, self.children(child)))
        return child

class ModuleScanner(Scanner):
    """An interruptible scanner that searches module synopses."""
    def __init__(self):
        roots = map(lambda dir: (dir, ''), pathdirs())
        Scanner.__init__(self, roots, self.submodules, self.isnewpackage)
        self.inodes = map(lambda (dir, pkg): os.stat(dir).st_ino, roots)

    def submodules(self, (dir, package)):
        children = []
        for file in os.listdir(dir):
            path = os.path.join(dir, file)
            if ispackage(path):
                children.append((path, package + (package and '.') + file))
            else:
                children.append((path, package))
        children.sort() # so that spam.py comes before spam.pyc or spam.pyo
        return children

    def isnewpackage(self, (dir, package)):
        inode = os.path.exists(dir) and os.stat(dir).st_ino
        if not (os.path.islink(dir) and inode in self.inodes):
            self.inodes.append(inode) # detect circular symbolic links
            return ispackage(dir)
        return False

    def run(self, callback, key=None, completer=None):
        if key: key = lower(key)
        self.quit = False
        seen = {}

        for modname in sys.builtin_module_names:
            if modname != '__main__':
                seen[modname] = 1
                if key is None:
                    callback(None, modname, '')
                else:
                    desc = split(__import__(modname).__doc__ or '', '\n')[0]
                    if find(lower(modname + ' - ' + desc), key) >= 0:
                        callback(None, modname, desc)

        while not self.quit:
            node = self.next()
            if not node: break
            path, package = node
            modname = inspect.getmodulename(path)
            if os.path.isfile(path) and modname:
                modname = package + (package and '.') + modname
                if not modname in seen:
                    seen[modname] = 1 # if we see spam.py, skip spam.pyc
                    if key is None:
                        callback(path, modname, '')
                    else:
                        desc = synopsis(path) or ''
                        if find(lower(modname + ' - ' + desc), key) >= 0:
                            callback(path, modname, desc)
        if completer: completer()

def apropos(key):
    """Print all the one-line module summaries that contain a substring."""
    def callback(path, modname, desc):
        if modname[-9:] == '.__init__':
            modname = modname[:-9] + ' (package)'
        print modname, desc and '- ' + desc
    try: import warnings
    except ImportError: pass
    else: warnings.filterwarnings('ignore') # ignore problems during import
    ModuleScanner().run(callback, key)


################################################## make it

import scribus
import sys
sys.setappdefaultencoding("utf8")

writedoc(scribus)
writedoc(scribus.PDFfile)
writedoc(scribus.Printer)