Question

I have a Python string containing information that I want to pull out using regex.

Example:

"The weather is 75 degrees with a humidity of 13%"

I want to just pull out the “75” and the “13.” Here is what I’ve tried so far in Python.

import re

str = "The weather is 75 degrees with a humidity of 13%"
m = re.search("The weather is \d+ degrees with a humidity of \d+%", str)
matched = m.group()

However, this obviously matches the entire string instead of just the parts I want. How do I pull out just the numbers that I want? I’ve looked into backreferences but it seems to only apply to within the regex pattern itself.

Answer 1

m = re.search("The weather is (\d+) degrees with a humidity of (\d+)%", str)
matched = m.groups()

you need to wrap what you want in parenthesis …

>>> s1 = "The weather is 75 degrees with a humidity of 13%"
>>> m = re.search("The weather is (\d+) degrees with a humidity of (\d+)%", s1)
>>> m.groups()
('75', '13')

or just use findall to just get the numbers out of any string

>>> re.findall("\d+",s1)
['75', '13']