Getting Info about the Python environment

[rasbt]

As suggested by @bollwyvl it would be a nice feature to also add a flag for additional info about the Python "environment", e.g,.

• python
  • conda
• "native" managers:
  • apt
  • dnf / yum
  • brew
• other vcs
  • hg

I feel like we are slowly running out of 1-letter flags ... Right now, we have

-v, --python          prints Python and IPython version

which prints something like:

CPython 3.4.3
IPython 3.0.0

I would suggest to add an integer argument for verbosity here (default: 1).

for example,

%watermark -v 0
CPython 3.4.3


%watermark -v 1    (default)
CPython 3.4.3
IPython 3.0.0


%watermark -v 2   
CPython 3.4.3
IPython 3.0.0
pip 7.1.0
conda 3.16.0


%watermark -v 3
CPython 3.4.3
IPython 3.0.0
pip 7.1.0
conda 3.16.0
/Users/sebastian/miniconda3/bin/python

But I am open to suggestions!