1.3 正则表达式和python语言-1.3.8 创建字符集（[ ]）

import re
# 下面的示例将说明对于 r2d2|c3po 的限制将比[cr][23][dp][o2]更为严格
m = re.match(‘[cr][23][dp][o2]‘, ‘c3po‘)# 匹配 ‘c3po‘
if m is not None: 
    print(m.group())
    print("match success")
else:
    print("match failed")

m = re.match(‘[cr][23][dp][o2]‘, ‘c2do‘)# 匹配 ‘c2do‘
if m is not None: 
    print(m.group())
    print("match success")
else:
    print("match failed")

m = re.match(‘r2d2|c3po‘, ‘c2do‘)# 不匹配 ‘c2do‘
if m is not None: 
    print(m.group())
    print("match success")
else:
    print("match failed")

m = re.match(‘r2d2|c3po‘, ‘r2d2‘)# 匹配 ‘r2d2‘
if m is not None: 
    print(m.group())
    print("match success")
else:
    print("match failed")