Because you are have an existing app in Python. Because you need some library that is not available in Go. Because you prefer Python. All are valid reasons.
replythen why not just use threads/processes in python?
replyBecause they are not the same as Go-style green threads/coroutines?
replyClearly lol. I think a good-faith interpretation of the question is: "What kinds of things is go's concurrency model suited for where the normal pythonic alternative is cumbersome/less desirable"
replySomeone desires attention ..
reply