integer to bytes with escape for regexp module - example bytes b'\xd7(\x7f\xf2'

Question

import re a=0xf27f28d7 b=a.to_bytes(4, \'little\') with open(fimage, \'rb\') as f: [hex(m.start(0)] for m in re,finditer(b, f.read())

b = b\'\\xd7(\\x7f\\xf2\'