To extract each digit from a string −
>>> str1='a34e 345 bcd 5he 78 xyz' >>> for s in str1: if s.isdigit():print (s) 3 4 3 4 5 5 7 8
To extract only integers from a string in which words are separated by space character −
>>> str1='h3110 23 cat 444.4 rabbit 11 2 dog' >>> for s in str1.split(): if s.isdigit(): print ((s)) 23 11 2