I recently posted a question and self-answer on Stack Overflow. Because (in my opinion), it's the best contribution I have made to the site thus far, I would like to post it on other topic-appropriate Stack Exchange sites such as datascience.stackexchange.com.
Is this appropriate?
I understand that the fact that it's a Q&A pair can affect whether this behavior is okay. As a result I would also like to know your judgement if it was just a plain answer that would answer questions on different sites.