python: remove implicit pip dependency

[fortaa]

Rely on the standard libraries instead in order to install
dependencies.

Bug: #421

[CeleritasCelery]

Can you explain more what you are doing here? it looks like you are just running pip in a virtual environment. I don't quite understand how that fixes #421.

[fortaa]

Troy Hinckley ***@***.***> writes:

Can you explain more what you are doing here? it looks like you are just running pip in a virtual environment. I don't quite understand how that fixes #421.

Indeed invoking pip inside a virtual environment is not that interesting. However by a mere creation of the latter the bootstraping code of the installer module is activated [0]. Hence it is not necessary to have this module in the search path of Python runtime that executes anaconda-mode.py. The main beneficiaries of this change are users of Linux distributions, whose maintainers decided not to ship pip as an integral component of a distribution-specific Python package. [0] https://docs.python.org/3/library/ensurepip.html