#小练习 正则表达式匹配邮箱名称

s='[email protected],    [email protected],[email protected], [email protected], [Master][email protected],[科比][email protected],[email protected],[email protected]'

要求：输出[email protected] 或 [xxx][email protected] 格式的邮箱地址，邮箱末尾可以有逗号

import re

p=r'\[?\w+\]?\w+@\w+\.\w{2,3},?'

print re.findall(p,s)

# 结果：['[email protected],', '[email protected],', '[email protected],', '[email protected],', '[Master][email protected],', '[email protected],', '[email protected],', '[email protected]']

\w 匹配 任意数字和字母，输出[email protected]，而不是[科比][email protected]；无法匹配T-Mac中的T-，使用p=r'\[?\w+\]?-?\w+@\w+\.\w{2,3},?' 可以匹配T-Mac

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import re

s='[email protected],    [email protected],[email protected], [email protected],  [Master][email protected],[科比][email protected],  [email protected],[email protected]'

p=r'\[?\S+\]?\S+@\S+\.\w+'

print re.findall(p,s)

# 结果：['[email protected]', '[email protected],[email protected]', '[email protected]', '[Master][email protected],[\xbf\xc6\xb1\xc8][email protected]', '[email protected],[email protected]']

\S 匹配任意非空白字符，s中只有[email protected]、[email protected]、[Master][email protected]、[email protected]前面出现空白，则直到遇到下个空白字符为止，此次匹配结束。所以出现类似 '[email protected],[email protected]' 的列表项。

所以此处建议使用\w 实现