# coding=utf-8
character = []
# 所有大写字母
for i in range(65, 91):
character.append(chr(i))
# 所有小写字母
for i in range(97,123):
character.append(chr(i))
# 所有数字
for i in range(48,58):
character.append(chr(i))
print(character)
原文：http://www.cnblogs.com/Mrtree/p/7768373.html