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+--- Thread: Regular Expressions with inputs (/thread-5848.html)
Regular Expressions with inputs - MethodRunner147 - Oct-24-2017
Hi, I am trying to let a user input a username that is 8 characters long . Then if they enter it incorrectly, display an error message and ask them to enter a correct username. Every time I enter an 8 digit long username, it still says it is an invalid username. I have left the code below. Any help is appreciated.
import re
username = str(input("Please enter an 8 digit username: ")).lower()
if username ==("[a-z]{8}"):
print("Valid username")
else:
str(input("Please enter a valid username"))
RE: Regular Expressions with inputs - Mekire - Oct-24-2017
You haven't actually used the
re module here.If you wanted to use
re you would need to change your conditional to something like:if re.match("^[a-z]{8}$", username):but... don't do that.
Just check the length:
if len(username) == 8 and username.isalpha():No need for regular expressions here at all.