问题
Possible Duplicate:
Substitute multiple whitespace with single whitespace in Python
trying to figure out how to write a regex that given the string:
"hi this is a test"
I can turn it into
"hi this is a test"
where the whitespace is normalized to just one space
any ideas? thanks so much
回答1:
import re
re.sub("\s+"," ",string)
回答2:
Does it need to be a regex?
I'd just use
new_string = " ".join(re.split(s'\s+', old_string.strip()))
回答3:
sed
sed 's/[ ]\{2,\}/ /g'
来源：https://stackoverflow.com/questions/2977905/anyone-know-a-good-regex-to-remove-extra-whitespace