os.walk 与正则表达式

我想获取适用于我拥有的正则表达式的文件列表。我想我应该使用 os.walk，但是我如何将它与正则表达式一起使用？

Thanks.

我不知道 stdlib 中有任何实现此功能的内容，但编码并不难：

import os, os.path

def iter_matching(dirpath, regexp):
    """Generator yielding all files under `dirpath` whose absolute path
       matches the regular expression `regexp`.
       Usage:

           >>> for filename in iter_matching('/', r'/home.*\.bak'):
           ....    # do something
    """
    for dir_, dirnames, filenames in os.walk(dirpath):
        for filename in filenames:
            abspath = os.path.join(dir_, filename)
            if regexp.match(abspath):
                yield abspath

或者更一般的：

import os, os.path

def filter_filenames(dirpath, predicate):
    """Usage:

           >>> for filename in filter_filenames('/', re.compile(r'/home.*\.bak').match):
           ....    # do something
    """
    for dir_, dirnames, filenames in os.walk(dirpath):
        for filename in filenames:
            abspath = os.path.join(dir_, filename)
            if predicate(abspath):
                yield abspath