CODEWITHSUNDEEP
pythonpython-3.x
user11705018
user11705018

Reputation:

Slice indices must be integers or None or have an __index__ method error?

So I am trying to correct this code:

if len(username) < 5 or username.index("!", "@") == -1:
    print("no")
else:
    print(f"Your username is {username}")

However I get the error message about slice indices needing to be integers. I am just not sure how to do that. Basically my code is checking a username.

if the length is less than 5 characters OR if the following symbols not included reject the attempt etc.

Upvotes: 0

Views: 395

Answers (2)

rdas
rdas

Reputation: 21275

Check the signature of the str.index method

str.index(str, beg = 0 end = len(string))

In your call:

username.index("!", "@")

The value for beg will be set to '@' - which is not a valid index. That is what the error is telling you.

Your check can simply be:

if len(username) < 5 or not ('!' in username or '@' in username):

Upvotes: 1

Anton Pomieshchenko
Anton Pomieshchenko

Reputation: 2167

Does it work for you:

if len(username) < 5 or not set(username) & set(["!", "@"]):
    print("no")
else:
    print(f"Your username is {username}")

Upvotes: 1

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