In my opinion, the worst problem is the lack of a standard way to handle dependencies. I recently had a hard time deploying a small Python project over a few heterogeneous Linux machines.

For example, this "simple, lightweight" program has dependencies, as one can see in its .travis.yaml file. That's why the readme has the command `pip install commonmark` (plus more dependencies for dev). But, wait, doesn't `pip` install as root in /usr/local/ by default? (BTW, the documentation of `pip install` is mute on the subject.) So I should use pipenv, but last time I tried it was broken and the ticket had low activity. So virtualenv + pip, but it's a mess since I like using many terminals. I've heard about poetry, but that's not standard at all...