Where is the mistake? В чем косяк?(Python)

Question

Задача по проверке телефонных номеров. Код работает, но один из скрытых тестов завален.
The task is to check the phone numbers. It works, but one of the closed tests is failed.

import re
num=input()
pattern=r"^1|8|9\d{7}"
if re.match(pattern, num):print('Valid')
else:print('Invalid')

Answer 1

your pattern gives this match:

12345678
^ ^

so only the first and last digit get matched. You can use an online regex tester to see what happens:

https://pythex.org/?regex=%5E1%7C8%7C9%5Cd%7B7%7D&test_string=12345678&ignorecase=0&multiline=0&dotall=0&verbose=0
Don't worry about the URL, it just leads to a pythex.org and shows the result of your pattern

Answer 2

pattern = r'^[189]\d{7}#x27;