string.digits, string.letters? How?

[Chris Gonnerman]

----- Original Message ----- 
From: "Paul Lim" <paullim at starhub.net.sg>


> Hi again to all,
> 
> I am a newbie in Python and please really pardon me for my trivial
> question.
> 
> How can we use the digits, letters variable in the string modules?
> 
> I have the following snippet of my code
> 
> # Import library modules
> # ======================
> 
> import sys
> from string import lower, find, atoi, digits, letters
> 
> if digits(sys.argv[i+1]):
>    print "Invalid argument"
> 
> but i get the error message
>   File "test.py", line 32, in ?
>     if digits(sys.argv[i+1]):
> TypeError: object is not callable: '0123456789'
> 
> What is wrong?

Your thinking is very muddy.  'digits' is in fact a string variable, 
not a callable, so you can't use the (...) form after it (as you
can plainly see).

The variable 'i' isn't set in your code, either, so if digits
were a function (or other callable) you'd still have an error.

Please try telling us what precisely you are trying to do?

> Thank you very much.

You're welcome, for whatever my answer is worth.