import re

s = '1٤٥٦4'

# pega todos os dígitos (inclusive ٤٥٦)
print(re.findall(r'\d', s))

# só pega os de 0 a 9
print(re.findall(r'[0-9]', s))
print(re.findall(r'\d', s, flags = re.ASCII))