[foxygen]

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.

[vorticalbox]

then why not just use threads/processes in python?

[foxygen]

Because they are not the same as Go-style green threads/coroutines?

[regular_trash]

Clearly 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"