error passing a string to int python code example

Example 1: how to make string to int in python

string = "324501763"
integer = int(string)

Example 2: 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