What happens with downloading pip packages?

Question

pip

I apologize right away - it got a little burnt. Through which slash does pip work? This devil cannot install packages for me even inside the virtual environment normally, where a priori there should be no conflicts - it is empty.
Secondly, he starts downloading scipy, everything crashes for him, he starts installing an earlier package for one minor version, the same thing. In short, this fool pumps all the packages in a row, going down one by one.
So - scipy itself is downloaded as a third-party dependency of another package, in my opinion matplotlib.
I have a few questions:
1) Don't modules have dependency versions, so that this beautiful pip doesn't download everything?
2) Does anyone get a bunch of weird errors while installing packages? It really bothers me to use packages that pip seems to have installed, but it just spit in my face with errors in the console.

And one more question not related to pip. I am creating a virtual environment on a mac. The python3 interpreter is in /usr/bin. I checked with the which command, and everything is in order with the environment variables. BUT, some kind of devil in pyvenv.cfg in home is the path to /usr/bin, which lies in general in XCode! What the hell is in these pools?

Answer 1

pip installs packages smoothly only for clear guys.