判断填写的ip是否正确

import re

def check_ip(address):
    if type(address) != str:
        return False
    expression = re.compile(‘\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}‘)
    if not expression.match(address):
        return False
    for number in address.split(‘.‘):
        if number.startswith(‘0‘) and len(number) >1 :
            return False
        if int(number) < 0 or int(number) > 255:
            return False
    return True

if __name__ == ‘__main__‘:
    
    print("check_ip(‘1.2.3.4‘)", ": ", check_ip(‘1.2.3.4‘))
    print("check_ip(‘1.2.3.444‘)", ": ", check_ip(‘1.2.3.444‘))
    print("check_ip(‘1.2.3.444‘)", ": ", check_ip(1))