打印 Python 本机库列表

Question

如何打印 Python 已有的库。如os、math、socket等

是否有类似于 "pip list" || "pip freeze" 的过程打印我安装的库？

（我是 Python 的新手，如果我对 python 库有严重的误解，请帮助我）。

Answer 1

你可以打印出 help('modules'):

只显示几行输出，因为它很大

>>> help('modules')

Please wait a moment while I gather a list of all available modules...

IN                  aifc                hmac                sf
__future__          another             html                shelve
_ast                antigravity         http                shlex
_bisect             argparse            idlelib             shutil
_bootlocale         array               imaplib             signal
_bz2                ast                 imghdr              site
_codecs             asynchat            imp                 smtpd
_codecs_cn          asyncio             importlib           smtplib
_codecs_hk          asyncore            inspect             sndhdr
_codecs_iso2022     atexit              io                  socket
_codecs_jp          audioop             ipaddress           socketserver
_codecs_kr          base64              itertools           something
_codecs_tw          bdb                 json                sqlite3
_collections        binascii            keyword             sre_compile
_collections_abc    binhex              lib2to3             sre_constants
_compat_pickle      bisect              linecache           sre_parse
_compression        builtins            locale              ssl
_crypt              bz2                 logging             stat
_csv                cProfile            lzma                statistics
_ctypes             calendar            macpath             string

您也可以通过搜索匹配的词来缩小范围。例如，您想查找可能匹配 "collections":

的内容

>>> help('modules collections')

Here is a list of modules whose name or summary contains 'collections'.
If there are any, enter a module name to get more help.

_collections - High performance data structures.
_collections_abc - Abstract Base Classes (ABCs) for collections, according to PEP 3119.
collections
collections.__main__
collections.abc
test.test_collections - Unit tests for collections.py.
test.test_defaultdict - Unit tests for collections.defaultdict.
pip._vendor.requests.packages.urllib3._collections

然后，如果您需要有关特定模块的帮助，以获取有关它的更多信息，您只需调用该特定模块的帮助：

>>> help('collections')

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