author | martin.trojer@nokia.com |
Fri, 31 Jul 2009 15:01:17 +0100 | |
changeset 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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:mod:`pydoc` --- Documentation generator and online help system |
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=============================================================== |
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.. module:: pydoc |
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:synopsis: Documentation generator and online help system. |
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.. moduleauthor:: Ka-Ping Yee <ping@lfw.org> |
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.. sectionauthor:: Ka-Ping Yee <ping@lfw.org> |
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.. versionadded:: 2.1 |
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.. index:: |
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single: documentation; generation |
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single: documentation; online |
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single: help; online |
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The :mod:`pydoc` module automatically generates documentation from Python |
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modules. The documentation can be presented as pages of text on the console, |
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served to a Web browser, or saved to HTML files. |
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The built-in function :func:`help` invokes the online help system in the |
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interactive interpreter, which uses :mod:`pydoc` to generate its documentation |
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as text on the console. The same text documentation can also be viewed from |
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outside the Python interpreter by running :program:`pydoc` as a script at the |
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operating system's command prompt. For example, running :: |
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pydoc sys |
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at a shell prompt will display documentation on the :mod:`sys` module, in a |
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style similar to the manual pages shown by the Unix :program:`man` command. The |
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argument to :program:`pydoc` can be the name of a function, module, or package, |
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or a dotted reference to a class, method, or function within a module or module |
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in a package. If the argument to :program:`pydoc` looks like a path (that is, |
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it contains the path separator for your operating system, such as a slash in |
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Unix), and refers to an existing Python source file, then documentation is |
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produced for that file. |
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Specifying a :option:`-w` flag before the argument will cause HTML documentation |
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to be written out to a file in the current directory, instead of displaying text |
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on the console. |
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Specifying a :option:`-k` flag before the argument will search the synopsis |
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lines of all available modules for the keyword given as the argument, again in a |
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manner similar to the Unix :program:`man` command. The synopsis line of a |
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module is the first line of its documentation string. |
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You can also use :program:`pydoc` to start an HTTP server on the local machine |
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that will serve documentation to visiting Web browsers. :program:`pydoc` |
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:option:`-p 1234` will start a HTTP server on port 1234, allowing you to browse |
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the documentation at ``http://localhost:1234/`` in your preferred Web browser. |
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:program:`pydoc` :option:`-g` will start the server and additionally bring up a |
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small :mod:`Tkinter`\ -based graphical interface to help you search for |
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documentation pages. |
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When :program:`pydoc` generates documentation, it uses the current environment |
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and path to locate modules. Thus, invoking :program:`pydoc` :option:`spam` |
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documents precisely the version of the module you would get if you started the |
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Python interpreter and typed ``import spam``. |
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Module docs for core modules are assumed to reside in |
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http://docs.python.org/library/. This can be overridden by setting the |
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:envvar:`PYTHONDOCS` environment variable to a different URL or to a local |
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directory containing the Library Reference Manual pages. |
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