核心命令：python -m pydoc
查询某包：python -m pydoc 包名
示例：
C:\Users\xxx>python -m pydoc pydoc - the Python documentation tool pydoc <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 '\', 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. pydoc -k <keyword> Search for a keyword in the synopsis lines of all available modules. pydoc -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. pydoc -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. pydoc -w <name> ... Write out the HTML documentation for a module to a file in the current directory. If <name> contains a '\', it is treated as a filename; if it names a directory, documentation is written for all the contents. C:\Users\xxx>python -m pydoc xlrd Help on package xlrd: NAME xlrd DESCRIPTION # Copyright (c) 2005-2012 Stephen John Machin, Lingfo Pty Ltd # This module is part of the xlrd package, which is released under a # BSD-style licence. PACKAGE CONTENTS biffh book compdoc formatting formula info sheet timemachine xldate xlsx FUNCTIONS count_records(filename, outfile=<_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'>) For debugging and analysis: summarise the file's BIFF records. ie: produce a sorted file of ``(record_name, count)``. :param filename: The path to the file to be summarised. :param outfile: An open file, to which the summary is written. dump(filename, outfile=<_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'>, unnumbered=False) For debugging: dump an XLS file's BIFF records in char & hex. :param filename: The path to the file to be dumped. :param outfile: An open file, to which the dump is written. :param unnumbered: If true, omit offsets (for meaningful diffs). open_workbook(filename=None, logfile=<_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'>, verbosity=0, use_mmap=1, file_contents=None, encoding_override=None, formatting_info=False, on_demand=False, ragged_rows=False) Open a spreadsheet file for data extraction. :param filename: The path to the spreadsheet file to be opened. :param logfile: An open file to which messages and diagnostics are written. :param verbosity: Increases the volume of trace material written to the logfile. :param use_mmap: Whether to use the mmap module is determined heuristically. Use this arg to override the result. Current heuristic: mmap is used if it exists. :param file_contents: A string or an :class:`mmap.mmap` object or some other behave-alike object. If ``file_contents`` is supplied, ``filename`` will not be used, except (possibly) in messages. :param encoding_override: Used to overcome missing or bad codepage information in older-version files. See :doc:`unicode`. :param formatting_info: The default is ``False``, which saves memory. In this case, "Blank" cells, which are those with their own formatting information but no data, are treated as empty by ignoring the file's ``BLANK`` and ``MULBLANK`` records. This cuts off any bottom or right "margin" of rows of empty or blank cells. Only :meth:`~xlrd.sheet.Sheet.cell_value` and :meth:`~xlrd.sheet.Sheet.cell_type` are available. When ``True``, formatting information will be read from the spreadsheet file. This provides all cells, including empty and blank cells. Formatting information is available for each cell. Note that this will raise a NotImplementedError when used with an xlsx file. :param on_demand: Governs whether sheets are all loaded initially or when demanded by the caller. See :doc:`on_demand`. :param ragged_rows: The default of ``False`` means all rows are padded out with empty cells so that all rows have the same size as found in :attr:`~xlrd.sheet.Sheet.ncols`. ``True`` means that there are no empty cells at the ends of rows. This can result in substantial memory savings if rows are of widely varying sizes. See also the :meth:`~xlrd.sheet.Sheet.row_len` method. :returns: An instance of the :class:`~xlrd.book.Book` class. DATA FMLA_TYPE_ARRAY = 4 FMLA_TYPE_CELL = 1 FMLA_TYPE_COND_FMT = 8 FMLA_TYPE_DATA_VAL = 16 FMLA_TYPE_NAME = 32 FMLA_TYPE_SHARED = 2 MMAP_AVAILABLE = 1 -- More --