Python Forum

hi,

I want to validate that the below string should only contain 0-9A-Za-z. Not sure how the space can be ignored and through the invalid message if it contains -

Please help

import re
inp1="input should only contain a to z 1 to 9 A to Z-"
if not re.search('[0-9A-Za-z]',inp1):
    print "input invalid"
else:
    print "input is valid"

Thanks in advance!

A way to ignore the space is simply to allow white space together with the characters you mentioned. I would use

valid = re.match(r'^(?:[a-zA-Z0-9]|\s)*$', inp1) is not None

Tips:

1. Always use raw strings when you write regexes, ie r''
   
2. Python 2 support ends in 2020, use python 3.
   

Thanks Gribouillis