How would I go about while looping this code?

Question

So I'm creating a part of my program that raises a error when the user doesn't input a integer. Below is my code...

try:
    pw_length_ask = int(raw_input("How long would you like your password to be? "))
    final_pw_length = pw_length + int(pw_length_ask.strip())
    print("Pass length set to " + str(final_pw_length))
except ValueError:
    print("You must enter a number.")
    int(raw_input("How long would you like your password to be? "))

It works great until the user is asked to enter a number again...

ValueError

It just throws a ValueError then crashes. So how do I make it so that instead of giving the Value Error it repeats the question until the user gives correct input?

Please post error traceback here instead of linking to a screenshot — yash, Dec 27 '17 at 00:16
See https://meta.stackoverflow.com/a/285557/14122 re: why we don't welcome images of code (or errors). They're not searchable, they're unfriendly to assistive technologies like screen readers, they make the question less useful to others if/when the links eventually rot, etc. — Charles Duffy, Dec 27 '17 at 00:24

Reblochon Masque · Accepted Answer · 2017-12-27T00:29:58.840

0

You could put it in a while loop, like this:

while True:
    try:
        pw_length_ask = int(raw_input("How long would you like your password to be? "))
        final_pw_length = pw_length + int(pw_length_ask)
        print("Pass length set to " + str(final_pw_length))
        break
    except ValueError:
        print("You must enter a number.")

The error likely came from the input you placed in the except block.

edited Dec 27 '17 at 00:29

answered Dec 27 '17 at 00:22

Reblochon Masque

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`while`, not `While` – Charles Duffy Dec 27 '17 at 00:23
This also uses a `strip()` on an integer `pw_length_ask` so will likely trigger an error. The strip should after the `raw_input`. – SigmaPiEpsilon Dec 27 '17 at 00:29

How would I go about while looping this code?

1 Answers1