636 make python serialization usable again

[MaxBetzDLR]

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Closes #636

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.42%. Comparing base (abc02d7) to head (0059e92).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #761   +/-   ##
=======================================
  Coverage   96.42%   96.42%           
=======================================
  Files         130      130           
  Lines       10364    10364           
=======================================
  Hits         9994     9994           
  Misses        370      370           

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[dabele]

I like the general design, but have a few concerns about the implementation. I also don't understand some of the choices of TryPickling/ForcePickling/NoPickling, but I only added comments for some cases. Maybe try to explain your general reasoning there.