确定给定的Python模块是否是内置模块

sys.builtin_module_names

imp.is_builtin

>>> import imp
>>> f, path, desc = imp.find_module("sys")
>>> desc
('', '', 6)
>>> desc[2] == imp.C_BUILTIN
True

__file__

__file__

builtins

import x

x

# You may need to use setuptools.distutils depending on Python distribution.
import distutils
import glob
import os
import pkgutil
import sys    

def get_python_library():

    # Get list of the loaded source modules on sys.path.
    modules = { 
        module
        for _, module, package in list(pkgutil.iter_modules())
        if package is False
    }

    # Glob all the 'top_level.txt' files installed under site-packages.
    site_packages = glob.iglob(os.path.join(os.path.dirname(os.__file__) 
                    + '/site-packages', '*-info', 'top_level.txt'))

    # Read the files for the import names and remove them from the modules list.
    modules -= {open(txt).read().strip() for txt in site_packages}

    # Get the system packages.
    system_modules = set(sys.builtin_module_names)

    # Get the just the top-level packages from the python install.
    python_root = distutils.sysconfig.get_python_lib(standard_lib=True)
      _, top_level_libs, _ = list(os.walk(python_root))[0]

    return sorted(top_level_libs + list(modules | system_modules))

[..., 'imaplib', 'imghdr', 'imp', 'importlib', 'imputil', 'inspect', 'io', ...]

modules

pkgutil.iter_modules

sys.path

(module_loader, name, ispkg)

site_packages

modules

pip.get_installed_distributions

site

pip

requests-futures

requests_futures

colors

ansicolors

top_level.txt

system_modules

sys

gc

errno

top_level_libs

distutils.sysconfig.get_python_lib(standard_lib=True)

email

logging

xml

   >>> print(sys.version)
   2.7.10 (default, Jul 13 2015, 12:05:58)
   [GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)]
   >>> print(sys.hexversion)
   34015984
   >>> python_stdlib = get_python_libirary()
   >>> len(python_stdlib)
   403

pip

setuptools

six