Task: Fix TypeError in Scikit-learn RFECV with Sparse Matrix and List Target

Task: Fix TypeError in Scikit-learn RFECV with Sparse Matrix and List Target: a task in Terminal-Lego-15k (Harbor dataset). When using scikit-learn's RFECV (Recursive Feature Elimination with Cross-Validation) with a sparse matrix produced by DictVectorizer and a plain Python list as the target…