python에서 error exception이 발생하도록 하려면?

while True:
    try:
        HOST = input(float('Enter host IP: '))
    except ValueError:
        print('Error. That is not a valid IP address.')
        continue

while True:
    try:
        HOST = input('Enter host IP: ')
        if len(HOST.split(".")) != 4:
            raise ValueError
        for char in HOST:
            if char not in "0123456789.":
                raise ValueError
    except ValueError:
        print('Error. That is not a valid IP address.')
        continue
    else:
        break

import re

while True:
    HOST = input("Enter IP adress: ")
    if re.match(
        r"^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$",
        HOST,
    ):
        print(f"{inp} is valid IP adress")
        break
    else:
        print("Enter valid IP adress")