D'Arcy J.M. Cain wrote:
On Thu, 14 Jan 2010 07:52:58 -0800 (PST)
chandra <chyav...@gmail.com> wrote:
Folks,
I am new to Python and could not find a function along the lines of
Welcome.
string.ishex in Python. There is however, a string.hexdigits constant
in the string module. I thought I would enhance the existing modlue
but am unsure how I should go about it. Specifically, I have attempted
this much:
You should always test code before posting and post the exact code that
you tested.
---cut---
#! /usr/bin/python
# -*- coding: utf-8 -*-
import string
def ishex(string):
Bad idea to name your variable after a module. This function fails
because of that.
ishex = False
for i in strdef ishex(sing:
if i in string.hexdigits:
ishex = True
else:
ishex = False
break
return ishex
After renaming the variable this works but you can simplify it.
---cut---
Just return False once you find a non-hex digit.
def ishex(s):
for c in s:
if not c in string.hexdigits: return False
return True
And here are your unit tests. Every line should print "True".
print ishex('123') is True
print ishex('abc') is True
print ishex('xyz') is False
print ishex('0123456789abcdefABCDEF') is True
print ishex('0123456789abcdefABCDEFG') is False
Don't use 'is', use '=='.
BTW, ishex('') should return False.
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