有没有一段代码,让你为人类的智慧所折服

如何单独使用正则表达式验证所有email地址?

坐稳了!答案是:

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上述正则表达式有 6.2kb,由于太过复杂,并不适宜人类阅读,建议直接调用。

我用 Python 3.8.12做一个测试:(请不断拖拽代码块下方的滑块)

#导入正则表达式模块importre

#设定验证规则regex=r'(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:\\".\[\]
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\t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\]
\000-\031]+(?:(?:(?:\r\n)?[
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[
\t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\]
\000-\031]+(?:(?:(?:\r\n)?[
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[
\t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[
\t])*))*\>(?:(?:\r\n)?[ \t])*))*)?;\s*)'

#定义验证函数defmailvalidate(mailaddress):

if(re.fullmatch(regex,mailaddress)):

print("Valid Email")

else:

print("Invalid Email")

#对地址“contact@wired.me.uk”进行验证mailvalidate("contact@wired.me.uk")

验证结果有效:Valid Email

据说,该正则表达式能验证所有 RFC822格式的email地址!

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