How to extract an integer from a string in python code example

Example 1: python extract all numbers from string re

>>> str = "h3110 23 cat 444.4 rabbit 11 2 dog"
>>> [int(s) for s in str.split() if s.isdigit()]
[23, 11, 2]

Example 2: python get int from string

>>> import re
>>> string1 = "498results should get"
>>> int(re.search(r'\d+', string1).group())
498

Example 3: how to get a int from string python

import re
s = "12 hello 52 19 some random 15 number"
# Extract numbers and cast them to int
list_of_nums = map(int, re.findall('\d+', s))
print list_of_nums