How to express logical or in regular expression in python? Why re.search("o"|"a","hallo")
and re.search(("o"|"a"),"hallo")
is wrong?
>>> if(re.search("a","hallo")):print("ok")
...
ok
>>> if(re.search("o","hallo")):print("ok")
...
ok
>>> if(re.search("o"|"a","hallo")):print("ok")
...
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for |: 'str' and 'str'
>>> if(re.search(("o"|"a"),"hallo")):print("ok")
...
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for |: 'str' and 'str'
You should instead do it as:
re.search(r"(o|a)","hallo")
The ""
should encompass the whole pattern.
You could also do:
re.search(r"[oa]","hallo")
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.