import re key = r"mat cat hat pat" p1 = r"[^c|p]at" pattern1 = re.compile(p1) print pattern1.findall(key)
['mat', 'hat']
['cat', 'pat']
['mat', 'hat', 'pat']
[]
[^a-z]反取,匹配出除字母外的字符,^元字符如果写到字符集里就是反取
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