CODEWITHSUNDEEP
pythonregex
Gocht
Gocht

Reputation: 10256

Regex - Non grouping and conditional block does not match

I have this pattern:

>>> pat = r'(?:.*)?(name)|nombres?'

When I test:

>>> import re
>>> re.search('nombre', pat).group()
>>> 'nombre'
>>> re.search('name', pat).group()
>>> 'name'

But

>>> re.search('first_name', pat).group()
>>> *** AttributeError: 'NoneType' object has no attribute 'group'

Upvotes: 0

Views: 45

Answers (2)

cmaglie
cmaglie

Reputation: 151

As already answered the arguments are swapped it should be:

re.search(pat, 'first_name').group()

I'd say also that you may want to check if the pattern has actually matched before trying to extract the group match:

result = re.search(pat, 'first_name')
if result:
   print(result.group())
else:
   print("not found")

Upvotes: 1

user2357112
user2357112

Reputation: 281012

You have the arguments in the wrong order. The pattern goes first.

Upvotes: 2

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