Scikit Learn OneHotEncoder fit and transform Error: ValueError: X has different shape than during fitting

Question

Below is my code.

I know why the error is occurring during transform. It is because of the feature list mismatch during fit and transform. How can i solve this? How

Answer 1

You encoder is fitted on refreshed_df which contains 10 columns and your refreshed_df1 contains only 4, literally what it is reported in the error. You have either to delete the columns not appearing on your refreshed_df1 or just fit your encoder to a new version of refreshed_df that only contains the 4 columns appearing in refreshed_df1 .