pre_process_encoding.py

import category_encoders as ce
# create an object of the OneHotEncoder
OHE = ce.OneHotEncoder(cols=['Item_Fat_Content',
                             'Item_Type',
                             'Outlet_Identifier',
                             'Outlet_Size',
                             'Outlet_Location_Type',
                             'Outlet_Type'],use_cat_names=True)
# encode the categorical variables
train_data = OHE.fit_transform(train_data)