changes list conversion to avoid numpy yaml error #560
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Description
Bugfix for yaml-numpy.core.multiarray.scalar-error that prevents working with workflows that involve PCA step.
Changes
tolist() changes the way the yaml saves the explained_variance_ratio and is therefore interpretable by yaml library
Testing
May be tested by creating workflows that involve PCA and then change values, reopen, etc.
PR checklist
Development
Mergeability
black
Code review