On 28Dec2020 13:08, Mats Wichmann <[email protected]> wrote:
>On 12/28/20 10:46 AM, Marco Sulla wrote:
>>On Mon, 28 Dec 2020 at 17:37, Bischoop <[email protected]> wrote:
>>>I'd like to check if there's "@" in a string and wondering if any
>>>method is better/safer than others.
Others have pointed out: '@' in s
>Will add that Yes, you should always validate your inputs, but No, the
>presence of an @ sign in a text string is not sufficient to know it's a
>valid email address. Unfortunately validating that is hard.
Validating that it is a functional email address is hard, involves
delivering email and then finding out if it was delivered.
A proper syntax check requires parsing an RFC5322 address grammar:
https://tools.ietf.org/rfcmarkup/5322#section-3.4
Fortunately, Python ships with one of those in the email.utils module.
The parseaddr() function will parse a single address, and getaddresses()
will parse a list of addresses such as might be in a To: header line.
They work well - I've been filing my email based on these for years -
MANY thousands of messages.
Cheers,
Cameron Simpson <[email protected]>
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