Fixes lazy loading

[Zethson]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.40%. Comparing base (7a83a8b) to head (a9c168c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #648      +/-   ##
==========================================
- Coverage   66.99%   66.40%   -0.59%     
==========================================
  Files          46       46              
  Lines        5942     5963      +21     
==========================================
- Hits         3981     3960      -21     
- Misses       1961     2003      +42     

Files	Coverage Δ
pertpy/__init__.py	100.00% <100.00%> (ø)
pertpy/tools/__init__.py	94.73% <100.00%> (-5.27%)	⬇️

... and 1 file with indirect coverage changes