re 怎么判断字符串仅包含某些特定的字符

Question

比如说我有一个字符串
'11-23-23-44'
怎么实现如果只有[0-9\-]返回True
否则 False

Answer 1

python3

>>> ls=['11-23-23-44','11-23-23-44x']
>>> import re
>>> def chk(s):
    return not re.search(r'[^-\d]',s)

>>> [chk(s)for s in ls]
[True, False]

Answer 2

[^0-9\-]