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no1xsyzy/v2ex_645024.py

Created February 17, 2020 11:21
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v2ex_645024.py
import re
PATTERN = r"/|(/[^.][^/]*|/[^/][^./][^/]*|/\.\.[^/]+)+/?"
assert re.fullmatch(PATTERN, "/abc/") is not None
assert re.fullmatch(PATTERN, "/abc/../") is None
assert re.fullmatch(PATTERN, "/abc/./") is None
assert re.fullmatch(PATTERN, "/abc/.123/") is not None
assert re.fullmatch(PATTERN, "/abc/a.123/") is not None
assert re.fullmatch(PATTERN, "/abc/a./") is not None
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