EK python interface fix

[itischler]

Fixes #

Description of changes:

PR Checklist

• Tests?
  • Interface
  • Core
• Docs?

[codecov]

Codecov Report

Merging #2486 into python will decrease coverage by <1%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           python   #2486     +/-   ##
========================================
- Coverage      71%     71%     -1%     
========================================
  Files         483     486      +3     
  Lines       28922   30360   +1438     
========================================
+ Hits        20765   21620    +855     
- Misses       8157    8740    +583

Impacted Files	Coverage Δ
src/core/constraints/HomogeneousMagneticField.cpp	80% <0%> (-20%)	⬇️
src/core/RuntimeError.cpp	84% <0%> (-16%)	⬇️
.../core/electrostatics_magnetostatics/p3m-common.cpp	67% <0%> (-6%)	⬇️
src/core/pressure_inline.hpp	37% <0%> (-5%)	⬇️
src/script_interface/Serializer.hpp	75% <0%> (-4%)	⬇️
src/core/energy.cpp	80% <0%> (-4%)	⬇️
src/core/electrostatics_magnetostatics/icc.cpp	64% <0%> (-4%)	⬇️
src/core/initialize.cpp	84% <0%> (-4%)	⬇️
src/core/debug.cpp	28% <0%> (-3%)	⬇️
src/core/shapes/Slitpore.cpp	43% <0%> (-3%)	⬇️
... and 141 more

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