def check_zip_code(text): result = re.search(r'\d{5}(?:-\d{4})?', text) return result != None

(?!\A)\b\d{5}(?:-\d{4})?\b

import re

def check_zip_code (text):
    m = re.search(r'(?!\A)\b\d{5}(?:-\d{4})?\b', text)
    return True if m else False

print(check_zip_code("The zip codes for New York are 10001 thru 11104.")) # True
print(check_zip_code("90210 is a TV show")) # False
print(check_zip_code("Their address is: 123 Main Street, Anytown, AZ 85258-0001.")) # True
print(check_zip_code("The Parliament of Canada is at 111 Wellington St, Ottawa, ON K1A0A9.")) # False