Python core - Phone Number Validator

Question

Hi!

Need help with task listed in topic.

Why that code don't pass tests?

import re
#your code goes here
phone_number = input()

pattern = r"^1|8|9[0-9]{7}

Answer 1

try the pattern in this way: (we need to use a character group)

pattern = "^[1|8|9][0-9]{7}quot;
^^^^^^^
or:

pattern = r"^[189][0-9]{7}quot;
^^^^^^

Answer 2

[En]moVes ,

the check for the length was done in the initial code:

{7} is a quantifier that defines that the previous characters has to be of length 7. the length of the starting numer is 1. so in total we have defined a length of 8 characters.

Answer 3

https://code.sololearn.com/cXAx7u3es5gO/?ref=app

Answer 4

[En]moVes

num = int(input())
print(len(num))

Answer 5

Sreeju Not from you, but from him in the original code

Answer 6

Obviously, because there was no check on the length of the number

Answer 7

I tought that pattern limited to 8 characters is enough.

Pattern start from 1 or 8 or 9 and then we have 7 digits between 0-9, that gives 8 characters.

Answer 8

Lothar I checked his code, he considers valid too short numbers.
I think it shouldn't be like this...