introspection.py 文件源码

def ignore_site_packages_paths():

    """
    This function ...
    :return:
    """

    paths = sys.path[:]
    # remove working directory so that all
    # local imports fail
    if os.getcwd() in sys.path:
        sys.path.remove(os.getcwd())
    # remove all third-party paths
    # so that only stdlib imports will succeed
    sys.path = list(set(filter(
        None,
        filter(lambda i: all(('site-packages' not in i,
                              'python' in i or 'pypy' in i)),
               map(methodcaller('lower'), sys.path))
    )))
    yield
    sys.path = paths

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