diff options
Diffstat (limited to 'Lib/pydoc.py')
| -rwxr-xr-x | Lib/pydoc.py | 677 |
1 files changed, 598 insertions, 79 deletions
diff --git a/Lib/pydoc.py b/Lib/pydoc.py index 36c6a97..dc398e3 100755 --- a/Lib/pydoc.py +++ b/Lib/pydoc.py @@ -1,5 +1,4 @@ -#!/usr/bin/env python -# -*- coding: latin-1 -*- +#!/usr/bin/env python3 """Generate Python documentation in HTML or text for interactive use. In the Python interpreter, do "from pydoc import help" to provide online @@ -16,11 +15,17 @@ backslash on Windows) it is treated as the path to a Python source file. Run "pydoc -k <keyword>" to search for a keyword in the synopsis lines of all available modules. -Run "pydoc -p <port>" to start an HTTP server on a given port on the -local machine to generate documentation web pages. +Run "pydoc -p <port>" to start an HTTP server on the given port on the +local machine. Port number 0 can be used to get an arbitrary unused port. + +Run "pydoc -b" to start an HTTP server on an arbitrary unused port and +open a Web browser to interactively browse documentation. The -p option +can be used with the -b option to explicitly specify the server port. For platforms without a command line, "pydoc -g" starts the HTTP server -and also pops up a little window for controlling it. +and also pops up a little window for controlling it. This option is +deprecated, since the server can now be controlled directly from HTTP +clients. Run "pydoc -w <name>" to write out the HTML documentation for a module to a file named "<name>.html". @@ -52,10 +57,22 @@ Richard Chamberlain, for the first implementation of textdoc. # the current directory is changed with os.chdir(), an incorrect # path will be displayed. -import sys, imp, os, re, inspect, builtins, pkgutil -from reprlib import Repr -from traceback import extract_tb as _extract_tb +import os +import sys +import builtins +import imp +import io +import inspect +import pkgutil +import platform +import re +import time +import warnings from collections import deque +from reprlib import Repr +from traceback import extract_tb, format_exception_only + + # --------------------------------------------------------- common routines def pathdirs(): @@ -148,15 +165,19 @@ def _split_list(s, predicate): no.append(x) return yes, no -def visiblename(name, all=None): +def visiblename(name, all=None, obj=None): """Decide whether to show documentation on a variable.""" # Certain special names are redundant. _hidden_names = ('__builtins__', '__doc__', '__file__', '__path__', '__module__', '__name__', '__slots__', '__package__', - '__author__', '__credits__', '__date__', '__version__') + '__cached__', '__author__', '__credits__', '__date__', + '__version__') if name in _hidden_names: return 0 # Private names are hidden, but special names are displayed. if name.startswith('__') and name.endswith('__'): return 1 + # Namedtuples have public fields and methods with a single leading underscore + if name.startswith('_') and hasattr(obj, '_fields'): + return True if all is not None: # only document that which the programmer exported in __all__ return name in all @@ -285,7 +306,7 @@ def safeimport(path, forceload=0, cache={}): elif exc is SyntaxError: # A SyntaxError occurred before we could execute the module. raise ErrorDuringImport(value.filename, info) - elif exc is ImportError and _extract_tb(tb)[-1][2]=='safeimport': + elif exc is ImportError and extract_tb(tb)[-1][2]=='safeimport': # The import error occurred directly in this function, # which means there is no such module in the path. return None @@ -513,6 +534,10 @@ class HTMLDoc(Doc): text = name return '<a href="%s">%s</a>' % (url, text) + def filelink(self, url, path): + """Make a link to source file.""" + return '<a href="file:%s">%s</a>' % (url, path) + 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.""" @@ -591,7 +616,7 @@ class HTMLDoc(Doc): if sys.platform == 'win32': import nturl2path url = nturl2path.pathname2url(path) - filelink = '<a href="file:%s">%s</a>' % (url, path) + filelink = self.filelink(url, path) except TypeError: filelink = '(built-in)' info = [] @@ -620,7 +645,7 @@ class HTMLDoc(Doc): # if __all__ exists, believe it. Otherwise use old heuristic. if (all is not None or (inspect.getmodule(value) or object) is object): - if visiblename(key, all): + if visiblename(key, all, object): classes.append((key, value)) cdict[key] = cdict[value] = '#' + key for key, value in classes: @@ -636,13 +661,13 @@ class HTMLDoc(Doc): # if __all__ exists, believe it. Otherwise use old heuristic. if (all is not None or inspect.isbuiltin(value) or inspect.getmodule(value) is object): - if visiblename(key, all): + if visiblename(key, all, object): 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, all): + if visiblename(key, all, object): data.append((key, value)) doc = self.markup(getdoc(object), self.preformat, fdict, cdict) @@ -767,7 +792,7 @@ class HTMLDoc(Doc): attrs = [(name, kind, cls, value) for name, kind, cls, value in classify_class_attrs(object) - if visiblename(name)] + if visiblename(name, obj=object)] mdict = {} for key, kind, homecls, value in attrs: @@ -978,7 +1003,7 @@ class TextDoc(Doc): def bold(self, text): """Format a string in bold by overstriking.""" - return ''.join(map(lambda ch: ch + '\b' + ch, text)) + return ''.join(ch + '\b' + ch for ch in text) def indent(self, text, prefix=' '): """Indent text by prepending a given prefix to each line.""" @@ -1002,7 +1027,7 @@ class TextDoc(Doc): c, bases = entry result = result + prefix + classname(c, modname) if bases and bases != (parent,): - parents = map(lambda c, m=modname: classname(c, m), bases) + parents = (classname(c, modname) for c in bases) result = result + '(%s)' % ', '.join(parents) result = result + '\n' elif type(entry) is type([]): @@ -1034,18 +1059,18 @@ doubt, consult the module reference at the location listed above. # if __all__ exists, believe it. Otherwise use old heuristic. if (all is not None or (inspect.getmodule(value) or object) is object): - if visiblename(key, all): + if visiblename(key, all, object): classes.append((key, value)) funcs = [] for key, value in inspect.getmembers(object, inspect.isroutine): # if __all__ exists, believe it. Otherwise use old heuristic. if (all is not None or inspect.isbuiltin(value) or inspect.getmodule(value) is object): - if visiblename(key, all): + if visiblename(key, all, object): funcs.append((key, value)) data = [] for key, value in inspect.getmembers(object, isdata): - if visiblename(key, all): + if visiblename(key, all, object): data.append((key, value)) modpkgs = [] @@ -1184,7 +1209,7 @@ doubt, consult the module reference at the location listed above. attrs = [(name, kind, cls, value) for name, kind, cls, value in classify_class_attrs(object) - if visiblename(name)] + if visiblename(name, obj=object)] while attrs: if mro: @@ -1310,6 +1335,11 @@ doubt, consult the module reference at the location listed above. line += '\n' + self.indent(str(doc)) return line +class _PlainTextDoc(TextDoc): + """Subclass of TextDoc which overrides string styling""" + def bold(self, text): + return text + # --------------------------------------------------------- user interfaces def pager(text): @@ -1464,6 +1494,7 @@ def locate(path, forceload=0): # --------------------------------------- interactive interpreter interface text = TextDoc() +plaintext = _PlainTextDoc() html = HTMLDoc() def resolve(thing, forceload=0): @@ -1476,8 +1507,11 @@ def resolve(thing, forceload=0): else: return thing, getattr(thing, '__name__', None) -def render_doc(thing, title='Python Library Documentation: %s', forceload=0): +def render_doc(thing, title='Python Library Documentation: %s', forceload=0, + renderer=None): """Render text documentation, given an object or a path to an object.""" + if renderer is None: + renderer = text object, name = resolve(thing, forceload) desc = describe(object) module = inspect.getmodule(object) @@ -1496,12 +1530,16 @@ def render_doc(thing, title='Python Library Documentation: %s', forceload=0): # document its available methods instead of its value. object = type(object) desc += ' object' - return title % desc + '\n\n' + text.document(object, name) + return title % desc + '\n\n' + renderer.document(object, name) -def doc(thing, title='Python Library Documentation: %s', forceload=0): +def doc(thing, title='Python Library Documentation: %s', forceload=0, + output=None): """Display text documentation, given an object or a path to an object.""" try: - pager(render_doc(thing, title, forceload)) + if output is None: + pager(render_doc(thing, title, forceload)) + else: + output.write(render_doc(thing, title, forceload, plaintext)) except (ImportError, ErrorDuringImport) as value: print(value) @@ -1552,12 +1590,13 @@ class Helper: 'finally': 'try', 'for': ('for', 'break continue while'), 'from': 'import', - 'global': ('global', 'NAMESPACES'), + 'global': ('global', 'nonlocal NAMESPACES'), 'if': ('if', 'TRUTHVALUE'), 'import': ('import', 'MODULES'), 'in': ('in', 'SEQUENCEMETHODS'), 'is': 'COMPARISON', 'lambda': ('lambda', 'FUNCTIONS'), + 'nonlocal': ('nonlocal', 'global NAMESPACES'), 'not': 'BOOLEAN', 'or': 'BOOLEAN', 'pass': ('pass', ''), @@ -1652,7 +1691,7 @@ class Helper: 'NUMBERMETHODS': ('numeric-types', 'NUMBERS AUGMENTEDASSIGNMENT ' 'SPECIALMETHODS'), 'EXECUTION': ('execmodel', 'NAMESPACES DYNAMICFEATURES EXCEPTIONS'), - 'NAMESPACES': ('naming', 'global ASSIGNMENT DELETION DYNAMICFEATURES'), + 'NAMESPACES': ('naming', 'global nonlocal ASSIGNMENT DELETION DYNAMICFEATURES'), 'DYNAMICFEATURES': ('dynamic-features', ''), 'SCOPING': 'NAMESPACES', 'FRAMES': 'NAMESPACES', @@ -1754,9 +1793,9 @@ has the same effect as typing a particular string at the help> prompt. elif request in self.symbols: self.showsymbol(request) elif request in self.keywords: self.showtopic(request) elif request in self.topics: self.showtopic(request) - elif request: doc(request, 'Help on %s:') + elif request: doc(request, 'Help on %s:', output=self._output) elif isinstance(request, Helper): self() - else: doc(request, 'Help on %s:') + else: doc(request, 'Help on %s:', output=self._output) self.output.write('\n') def intro(self): @@ -1837,12 +1876,39 @@ module "pydoc_data.topics" could not be found. if more_xrefs: xrefs = (xrefs or '') + ' ' + more_xrefs if xrefs: - import io, formatter + import formatter buffer = io.StringIO() formatter.DumbWriter(buffer).send_flowing_data( 'Related help topics: ' + ', '.join(xrefs.split()) + '\n') self.output.write('\n%s\n' % buffer.getvalue()) + def _gettopic(self, topic, more_xrefs=''): + """Return unbuffered tuple of (topic, xrefs). + + If an error occurs here, the exception is caught and displayed by + the url handler. + + This function duplicates the showtopic method but returns its + result directly so it can be formatted for display in an html page. + """ + try: + import pydoc_data.topics + except ImportError: + return(''' +Sorry, topic and keyword documentation is not available because the +module "pydoc_data.topics" could not be found. +''' , '') + target = self.topics.get(topic, self.keywords.get(topic)) + if not target: + raise ValueError('could not find topic') + if isinstance(target, str): + return self._gettopic(target, more_xrefs) + label, xrefs = target + doc = pydoc_data.topics.topics[label] + if more_xrefs: + xrefs = (xrefs or '') + ' ' + more_xrefs + return doc, xrefs + def showsymbol(self, symbol): target = self.symbols[symbol] topic, _, xrefs = target.partition(' ') @@ -1924,6 +1990,15 @@ class ModuleScanner: for importer, modname, ispkg in pkgutil.walk_packages(onerror=onerror): if self.quit: break + + # XXX Skipping this file is a workaround for a bug + # that causes python to crash with a segfault. + # http://bugs.python.org/issue9319 + # + # TODO Remove this once the bug is fixed. + if modname in {'test.badsyntax_pep3120', 'badsyntax_pep3120'}: + continue + if key is None: callback(None, modname, '') else: @@ -1939,7 +2014,6 @@ class ModuleScanner: if onerror: onerror(modname) continue - import io desc = source_synopsis(io.StringIO(source)) or '' if hasattr(loader, 'get_filename'): path = loader.get_filename(modname) @@ -1969,16 +2043,18 @@ def apropos(key): print(modname, desc and '- ' + desc) def onerror(modname): pass - try: import warnings - except ImportError: pass - else: warnings.filterwarnings('ignore') # ignore problems during import - ModuleScanner().run(callback, key, onerror=onerror) + with warnings.catch_warnings(): + warnings.filterwarnings('ignore') # ignore problems during import + ModuleScanner().run(callback, key, onerror=onerror) -# --------------------------------------------------- web browser interface +# --------------------------------------------------- Web browser interface def serve(port, callback=None, completer=None): import http.server, email.message, select + msg = 'the pydoc.serve() function is deprecated' + warnings.warn(msg, DeprecationWarning, stacklevel=2) + class DocHandler(http.server.BaseHTTPRequestHandler): def send_document(self, title, contents): try: @@ -2026,8 +2102,8 @@ pydoc</strong> by Ka-Ping Yee <ping@lfw.org></font>''' class DocServer(http.server.HTTPServer): def __init__(self, port, callback): - host = (sys.platform == 'mac') and '127.0.0.1' or 'localhost' - self.address = ('', port) + host = 'localhost' + self.address = (host, port) self.url = 'http://%s:%d/' % (host, port) self.callback = callback self.base.__init__(self, self.address, self.handler) @@ -2038,6 +2114,7 @@ pydoc</strong> by Ka-Ping Yee <ping@lfw.org></font>''' while not self.quit: rd, wr, ex = select.select([self.socket.fileno()], [], [], 1) if rd: self.handle_request() + self.server_close() def server_activate(self): self.base.server_activate(self) @@ -2057,7 +2134,12 @@ pydoc</strong> by Ka-Ping Yee <ping@lfw.org></font>''' # ----------------------------------------------------- graphical interface def gui(): - """Graphical interface (starts web server and pops up a control window).""" + """Graphical interface (starts Web server and pops up a control window).""" + + msg = ('the pydoc.gui() function and "pydoc -g" option are deprecated\n', + 'use "pydoc.browse() function and "pydoc -b" option instead.') + warnings.warn(msg, DeprecationWarning, stacklevel=2) + class GUI: def __init__(self, window, port=7464): self.window = window @@ -2137,19 +2219,8 @@ def gui(): def open(self, event=None, url=None): url = url or self.server.url - try: - import webbrowser - webbrowser.open(url) - except ImportError: # pre-webbrowser.py compatibility - if sys.platform == 'win32': - os.system('start "%s"' % url) - elif sys.platform == 'mac': - try: import ic - except ImportError: pass - else: ic.launchurl(url) - else: - rc = os.system('netscape -remote "openURL(%s)" &' % url) - if rc: os.system('netscape "%s" &' % url) + import webbrowser + webbrowser.open(url) def quit(self, event=None): if self.server: @@ -2241,6 +2312,444 @@ def gui(): except KeyboardInterrupt: pass + +# --------------------------------------- enhanced Web browser interface + +def _start_server(urlhandler, port): + """Start an HTTP server thread on a specific port. + + Start an HTML/text server thread, so HTML or text documents can be + browsed dynamically and interactively with a Web browser. Example use: + + >>> import time + >>> import pydoc + + Define a URL handler. To determine what the client is asking + for, check the URL and content_type. + + Then get or generate some text or HTML code and return it. + + >>> def my_url_handler(url, content_type): + ... text = 'the URL sent was: (%s, %s)' % (url, content_type) + ... return text + + Start server thread on port 0. + If you use port 0, the server will pick a random port number. + You can then use serverthread.port to get the port number. + + >>> port = 0 + >>> serverthread = pydoc._start_server(my_url_handler, port) + + Check that the server is really started. If it is, open browser + and get first page. Use serverthread.url as the starting page. + + >>> if serverthread.serving: + ... import webbrowser + + The next two lines are commented out so a browser doesn't open if + doctest is run on this module. + + #... webbrowser.open(serverthread.url) + #True + + Let the server do its thing. We just need to monitor its status. + Use time.sleep so the loop doesn't hog the CPU. + + >>> starttime = time.time() + >>> timeout = 1 #seconds + + This is a short timeout for testing purposes. + + >>> while serverthread.serving: + ... time.sleep(.01) + ... if serverthread.serving and time.time() - starttime > timeout: + ... serverthread.stop() + ... break + + Print any errors that may have occurred. + + >>> print(serverthread.error) + None + """ + import http.server + import email.message + import select + import threading + + class DocHandler(http.server.BaseHTTPRequestHandler): + + def do_GET(self): + """Process a request from an HTML browser. + + The URL received is in self.path. + Get an HTML page from self.urlhandler and send it. + """ + if self.path.endswith('.css'): + content_type = 'text/css' + else: + content_type = 'text/html' + self.send_response(200) + self.send_header('Content-Type', '%s; charset=UTF-8' % content_type) + self.end_headers() + self.wfile.write(self.urlhandler( + self.path, content_type).encode('utf-8')) + + def log_message(self, *args): + # Don't log messages. + pass + + class DocServer(http.server.HTTPServer): + + def __init__(self, port, callback): + self.host = (sys.platform == 'mac') and '127.0.0.1' or 'localhost' + self.address = ('', port) + self.callback = callback + self.base.__init__(self, self.address, self.handler) + self.quit = False + + def serve_until_quit(self): + while not self.quit: + rd, wr, ex = select.select([self.socket.fileno()], [], [], 1) + if rd: + self.handle_request() + self.server_close() + + def server_activate(self): + self.base.server_activate(self) + if self.callback: + self.callback(self) + + class ServerThread(threading.Thread): + + def __init__(self, urlhandler, port): + self.urlhandler = urlhandler + self.port = int(port) + threading.Thread.__init__(self) + self.serving = False + self.error = None + + def run(self): + """Start the server.""" + try: + DocServer.base = http.server.HTTPServer + DocServer.handler = DocHandler + DocHandler.MessageClass = email.message.Message + DocHandler.urlhandler = staticmethod(self.urlhandler) + docsvr = DocServer(self.port, self.ready) + self.docserver = docsvr + docsvr.serve_until_quit() + except Exception as e: + self.error = e + + def ready(self, server): + self.serving = True + self.host = server.host + self.port = server.server_port + self.url = 'http://%s:%d/' % (self.host, self.port) + + def stop(self): + """Stop the server and this thread nicely""" + self.docserver.quit = True + self.serving = False + self.url = None + + thread = ServerThread(urlhandler, port) + thread.start() + # Wait until thread.serving is True to make sure we are + # really up before returning. + while not thread.error and not thread.serving: + time.sleep(.01) + return thread + + +def _url_handler(url, content_type="text/html"): + """The pydoc url handler for use with the pydoc server. + + If the content_type is 'text/css', the _pydoc.css style + sheet is read and returned if it exits. + + If the content_type is 'text/html', then the result of + get_html_page(url) is returned. + """ + class _HTMLDoc(HTMLDoc): + + def page(self, title, contents): + """Format an HTML page.""" + css_path = "pydoc_data/_pydoc.css" + css_link = ( + '<link rel="stylesheet" type="text/css" href="%s">' % + css_path) + return '''\ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<html><head><title>Pydoc: %s</title> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +%s</head><body bgcolor="#f0f0f8">%s<div style="clear:both;padding-top:.5em;">%s</div> +</body></html>''' % (title, css_link, html_navbar(), contents) + + def filelink(self, url, path): + return '<a href="getfile?key=%s">%s</a>' % (url, path) + + + html = _HTMLDoc() + + def html_navbar(): + version = html.escape("%s [%s, %s]" % (platform.python_version(), + platform.python_build()[0], + platform.python_compiler())) + return """ + <div style='float:left'> + Python %s<br>%s + </div> + <div style='float:right'> + <div style='text-align:center'> + <a href="index.html">Module Index</a> + : <a href="topics.html">Topics</a> + : <a href="keywords.html">Keywords</a> + </div> + <div> + <form action="get" style='display:inline;'> + <input type=text name=key size=15> + <input type=submit value="Get"> + </form> + <form action="search" style='display:inline;'> + <input type=text name=key size=15> + <input type=submit value="Search"> + </form> + </div> + </div> + """ % (version, html.escape(platform.platform(terse=True))) + + def html_index(): + """Module Index page.""" + + def bltinlink(name): + return '<a href="%s.html">%s</a>' % (name, name) + + heading = html.heading( + '<big><big><strong>Index of Modules</strong></big></big>', + '#ffffff', '#7799ee') + names = [name for name in sys.builtin_module_names + if name != '__main__'] + contents = html.multicolumn(names, bltinlink) + contents = [heading, '<p>' + html.bigsection( + 'Built-in Modules', '#ffffff', '#ee77aa', contents)] + + seen = {} + for dir in sys.path: + contents.append(html.index(dir, seen)) + + contents.append( + '<p align=right><font color="#909090" face="helvetica,' + 'arial"><strong>pydoc</strong> by Ka-Ping Yee' + '<ping@lfw.org></font>') + return 'Index of Modules', ''.join(contents) + + def html_search(key): + """Search results page.""" + # scan for modules + search_result = [] + + def callback(path, modname, desc): + if modname[-9:] == '.__init__': + modname = modname[:-9] + ' (package)' + search_result.append((modname, desc and '- ' + desc)) + + with warnings.catch_warnings(): + warnings.filterwarnings('ignore') # ignore problems during import + ModuleScanner().run(callback, key) + + # format page + def bltinlink(name): + return '<a href="%s.html">%s</a>' % (name, name) + + results = [] + heading = html.heading( + '<big><big><strong>Search Results</strong></big></big>', + '#ffffff', '#7799ee') + for name, desc in search_result: + results.append(bltinlink(name) + desc) + contents = heading + html.bigsection( + 'key = %s' % key, '#ffffff', '#ee77aa', '<br>'.join(results)) + return 'Search Results', contents + + def html_getfile(path): + """Get and display a source file listing safely.""" + path = path.replace('%20', ' ') + with open(path, 'r') as fp: + lines = html.escape(fp.read()) + body = '<pre>%s</pre>' % lines + heading = html.heading( + '<big><big><strong>File Listing</strong></big></big>', + '#ffffff', '#7799ee') + contents = heading + html.bigsection( + 'File: %s' % path, '#ffffff', '#ee77aa', body) + return 'getfile %s' % path, contents + + def html_topics(): + """Index of topic texts available.""" + + def bltinlink(name): + return '<a href="topic?key=%s">%s</a>' % (name, name) + + heading = html.heading( + '<big><big><strong>INDEX</strong></big></big>', + '#ffffff', '#7799ee') + names = sorted(Helper.topics.keys()) + + contents = html.multicolumn(names, bltinlink) + contents = heading + html.bigsection( + 'Topics', '#ffffff', '#ee77aa', contents) + return 'Topics', contents + + def html_keywords(): + """Index of keywords.""" + heading = html.heading( + '<big><big><strong>INDEX</strong></big></big>', + '#ffffff', '#7799ee') + names = sorted(Helper.keywords.keys()) + + def bltinlink(name): + return '<a href="topic?key=%s">%s</a>' % (name, name) + + contents = html.multicolumn(names, bltinlink) + contents = heading + html.bigsection( + 'Keywords', '#ffffff', '#ee77aa', contents) + return 'Keywords', contents + + def html_topicpage(topic): + """Topic or keyword help page.""" + buf = io.StringIO() + htmlhelp = Helper(buf, buf) + contents, xrefs = htmlhelp._gettopic(topic) + if topic in htmlhelp.keywords: + title = 'KEYWORD' + else: + title = 'TOPIC' + heading = html.heading( + '<big><big><strong>%s</strong></big></big>' % title, + '#ffffff', '#7799ee') + contents = '<pre>%s</pre>' % html.markup(contents) + contents = html.bigsection(topic , '#ffffff','#ee77aa', contents) + if xrefs: + xrefs = sorted(xrefs.split()) + + def bltinlink(name): + return '<a href="topic?key=%s">%s</a>' % (name, name) + + xrefs = html.multicolumn(xrefs, bltinlink) + xrefs = html.section('Related help topics: ', + '#ffffff', '#ee77aa', xrefs) + return ('%s %s' % (title, topic), + ''.join((heading, contents, xrefs))) + + def html_getobj(url): + obj = locate(url, forceload=1) + if obj is None and url != 'None': + raise ValueError('could not find object') + title = describe(obj) + content = html.document(obj, url) + return title, content + + def html_error(url, exc): + heading = html.heading( + '<big><big><strong>Error</strong></big></big>', + '#ffffff', '#7799ee') + contents = '<br>'.join(html.escape(line) for line in + format_exception_only(type(exc), exc)) + contents = heading + html.bigsection(url, '#ffffff', '#bb0000', + contents) + return "Error - %s" % url, contents + + def get_html_page(url): + """Generate an HTML page for url.""" + complete_url = url + if url.endswith('.html'): + url = url[:-5] + try: + if url in ("", "index"): + title, content = html_index() + elif url == "topics": + title, content = html_topics() + elif url == "keywords": + title, content = html_keywords() + elif '=' in url: + op, _, url = url.partition('=') + if op == "search?key": + title, content = html_search(url) + elif op == "getfile?key": + title, content = html_getfile(url) + elif op == "topic?key": + # try topics first, then objects. + try: + title, content = html_topicpage(url) + except ValueError: + title, content = html_getobj(url) + elif op == "get?key": + # try objects first, then topics. + if url in ("", "index"): + title, content = html_index() + else: + try: + title, content = html_getobj(url) + except ValueError: + title, content = html_topicpage(url) + else: + raise ValueError('bad pydoc url') + else: + title, content = html_getobj(url) + except Exception as exc: + # Catch any errors and display them in an error page. + title, content = html_error(complete_url, exc) + return html.page(title, content) + + if url.startswith('/'): + url = url[1:] + if content_type == 'text/css': + path_here = os.path.dirname(os.path.realpath(__file__)) + css_path = os.path.join(path_here, url) + with open(css_path) as fp: + return ''.join(fp.readlines()) + elif content_type == 'text/html': + return get_html_page(url) + # Errors outside the url handler are caught by the server. + raise TypeError('unknown content type %r for url %s' % (content_type, url)) + + +def browse(port=0, *, open_browser=True): + """Start the enhanced pydoc Web server and open a Web browser. + + Use port '0' to start the server on an arbitrary port. + Set open_browser to False to suppress opening a browser. + """ + import webbrowser + serverthread = _start_server(_url_handler, port) + if serverthread.error: + print(serverthread.error) + return + if serverthread.serving: + server_help_msg = 'Server commands: [b]rowser, [q]uit' + if open_browser: + webbrowser.open(serverthread.url) + try: + print('Server ready at', serverthread.url) + print(server_help_msg) + while serverthread.serving: + cmd = input('server> ') + cmd = cmd.lower() + if cmd == 'q': + break + elif cmd == 'b': + webbrowser.open(serverthread.url) + else: + print(server_help_msg) + except (KeyboardInterrupt, EOFError): + print() + finally: + if serverthread.serving: + serverthread.stop() + print('Server stopped') + + # -------------------------------------------------- command-line interface def ispath(x): @@ -2260,29 +2769,32 @@ def cli(): sys.path.insert(0, '.') try: - opts, args = getopt.getopt(sys.argv[1:], 'gk:p:w') - writing = 0 - + opts, args = getopt.getopt(sys.argv[1:], 'bgk:p:w') + writing = False + start_server = False + open_browser = False + port = None for opt, val in opts: if opt == '-g': gui() return + if opt == '-b': + start_server = True + open_browser = True if opt == '-k': apropos(val) return if opt == '-p': - try: - port = int(val) - except ValueError: - raise BadUsage - def ready(server): - print('pydoc server ready at %s' % server.url) - def stopped(): - print('pydoc server stopped') - serve(port, ready, stopped) - return + start_server = True + port = val if opt == '-w': - writing = 1 + writing = True + + if start_server == True: + if port == None: + port = 0 + browse(port, open_browser=open_browser) + return if not args: raise BadUsage for arg in args: @@ -2303,30 +2815,37 @@ def cli(): print(value) except (getopt.error, BadUsage): - cmd = os.path.basename(sys.argv[0]) + cmd = os.path.splitext(os.path.basename(sys.argv[0]))[0] print("""pydoc - the Python documentation tool -%s <name> ... +{cmd} <name> ... Show text documentation on something. <name> may be the name of a Python keyword, topic, function, module, or package, or a dotted reference to a class or function within a module or module in a - package. If <name> contains a '%s', it is used as the path to a + package. If <name> contains a '{sep}', it is used as the path to a Python source file to document. If name is 'keywords', 'topics', or 'modules', a listing of these things is displayed. -%s -k <keyword> +{cmd} -k <keyword> Search for a keyword in the synopsis lines of all available modules. -%s -p <port> - Start an HTTP server on the given port on the local machine. +{cmd} -p <port> + Start an HTTP server on the given port on the local machine. Port + number 0 can be used to get an arbitrary unused port. + +{cmd} -b + Start an HTTP server on an arbitrary unused port and open a Web browser + to interactively browse documentation. The -p option can be used with + the -b option to explicitly specify the server port. -%s -g - Pop up a graphical interface for finding and serving documentation. +{cmd} -g + Deprecated. -%s -w <name> ... +{cmd} -w <name> ... Write out the HTML documentation for a module to a file in the current - directory. If <name> contains a '%s', it is treated as a filename; if + directory. If <name> contains a '{sep}', it is treated as a filename; if it names a directory, documentation is written for all the contents. -""" % (cmd, os.sep, cmd, cmd, cmd, cmd, os.sep)) +""".format(cmd=cmd, sep=os.sep)) -if __name__ == '__main__': cli() +if __name__ == '__main__': + cli() |