[英]os.walk with regex
I'd like to get a list of files that apply to a regex that i have. 我想获得一个适用于我所拥有的正则表达式的文件列表。 I guess i should use os.walk, but how can i use it with regex?
我想我应该使用os.walk,但我如何使用正则表达式?
Thanks. 谢谢。
I'm not aware of anything in the stdlib implementing this, but it is not hard to code: 我不知道stdlib实现这一点的任何东西,但代码并不难:
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
Or the more general: 或者更一般:
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
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