I have a Python list of strings. I want to do the regex search on each element, filtering only those elements where I managed to capture the regex group. I think I can do the regex search only once using the walrus operator from Python 3.8. So far I have:
attacks = [match
for attack in attacks
if (match := re.search(r"(\([0-9]+d[\s\S]+\))", attack).group() is not None)]
The logic is: I take the found group if the regex search returned anything, which means it is not None. The problem is, the bevahiour is weird - I can print()
before this list comprehension, the program finishes with code 0, but there is no result and print()
after the list comprehension does not work. What am I doing wrong?
EDIT:
Full code:
text = "Speed 30 ft. Melee short sword +3 (1d6+1/19-20) Ranged light crossbow +3 (1d8/19-20) Special Attacks sneak attack +1d6 Spell-Like Abilities (CL 1st) "
if attacks:
attacks = attacks.group().split(")")
attacks = [match
for attack in attacks
if (match := re.search(r"(\([0-9]+d[\s\S]+\))", attack).group() is not None)]