Useful Values from the string Module : Introduction « String « Python Tutorial

1. Python Tutorial
2. String
3. Introduction

Constant                Description 

string.digits           A string containing the digits 09 
string.letters          A string containing all letters (upper- and lowercase) 
string.lowercase        A string containing all lowercase letters 
string.printable        A string containing all printable characters 
string.punctuation      A string containing all punctuation characters 
string.uppercase        A string containing all uppercase letters