Which method to check if string index is queal to character.

[Bischoop]

On 2020-12-28, Mats Wichmann <mats at wichmann.us> wrote:
> On 12/28/20 10:46 AM, Marco Sulla wrote:
>> On Mon, 28 Dec 2020 at 17:37, Bischoop <Bischoop at vimart.net> wrote:
>>>
>>> I'd like to check if there's "@" in a string and wondering if any method
>>> is better/safer than others. I was told on one occasion that I should
>>> use is than ==, so how would be on this example.
>>>
>>> s = 'this at mail.is'
>> 
>> You could do simply
>> 
>> if "@" in s:
>> 
>> but probably what you really want is a regular expression.
>> 
>
> 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.
>

Nah, by saying if is valid I meant exeactly if there's "@", I could add
yet if endswith() but at this point @ is enough. 
Yes the only possible way for full validation would be just sending
email and waiting for reply.