generating emails from Python

[Michele Simionato]

Is it possible, using email.MIMEMessage, to generate an email with
both HTML and plain text content, in such a way that:
1) it is displayed as HTML if the email client recognizes HTML;
2) it is displayed as plain text if the email client is HTML impaired?

I realize that the answer is most probably no, but one can always hope
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      Michele Simionato