How does "string".alnum() work

Asked Oct 22 '17 at 18:47

Active Oct 22 '17 at 18:50

Viewed 23 times

I am learning python on repl.it The problem is Whenever I take a input from user and compare it with .isalnum() The method always gives the output as True. Even if the input is only digits or only numbers

    a = input("Enter a value")
    If a.isalpha():
       print "Enter a correct value"
    else:
       print a

I have made sure not to include any whitespaces but the output is only to. Enter a correct value

Help appreciated

asked Oct 22 '17 at 18:47

user8095199

isalnum or isalpha. Which one is it? what do you want to do? input an integer? – Jean-François Fabre Oct 22 '17 at 18:48
Well it returns `True` if all chars are alphanumerical... – Willem Van Onsem Oct 22 '17 at 18:49
That's what `isalnum()` does, makes sure the string is alpha-numeric chars – Sterling Archer Oct 22 '17 at 18:49
I want the user to only input a integer and not a alphanumeric value – user8095199 Oct 22 '17 at 18:50
@user8095199: then you should use `isnumeric` – Willem Van Onsem Oct 22 '17 at 18:51
But why isn't alnum() working am I making any mistakes? – user8095199 Oct 22 '17 at 18:52

How does "string".alnum() work

0 Answers0