This whole chain started with someone pointing out the author doesn't seem to realize you can pin versions[1]. I'm just confused how people seemed to end up questioning what pip freeze does.
I tried to say that from mentioned tools only poetry can be called as a dependency management.
The other tools are used for different purposes, but perhaps could be used as a piece of package management in some way. The mentioned docker and vendoring is irrelevant to Python and it even applies to Go.
[1] https://news.ycombinator.com/item?id=32141573#32142190