如何将所有单词与正则表达式匹配，网址或类似字符除外？

Question

I'm trying to match all words in strings, except for strings with punctuation IN it like URLs.

I've tried many variations but when its working in the second string its wrong in first.

s1 = "My dog is nice! My cat not. www.test.org ?"
s2 = "I am."
regex = r"\b\w+\W* \b"
m1 = re.findall(regex, s1)
m2 = re.findall(regex, s2)

Output for m1 is right:

['My ', 'dog ', 'is ', 'nice! ', 'My ', 'cat ', 'not. ']

Output for m2 is not what I want:

['I ']

... but I want

['I ', 'am.']

Answer 1

You need an additional check...:

regex = r"\b\w+\W* \b|\b\w+\W$"

...to match end cases where space does not follow dot.

Working code :

import re

s1 = "My dog is nice! My cat not. www.test.org ?"
s2 = "I am."

regex = r"\b\w+\W* \b|\b\w+\W$"

m1 = re.findall(regex, s1)
m2 = re.findall(regex, s2)

print(m1) # ['My ', 'dog ', 'is ', 'nice! ', 'My ', 'cat ', 'not. ']
print(m2) # ['I ', 'am.']