Remove \r\n' from string in python 3

Question

Given this string

b'141\r\n'

got by serial.readlines() , how can I extrapolate 141, or however the number in its position? Actually I can remove b' simply by using string[2:] but I cannot remove the remainder in this way. string.replace does not work I don't know why.

The number of figures in the number may vary. Is there a smart way to avoid this problem?

Answer 1

Ok so theres two questions here. Is your object

b = b'141\r\n'

or

s = "b'141\\r\\n'"

If it's the former

b.decode().strip()

if it's the latter

import re
re.search(r'\d+', s).group(0)