Top & Bottom Categories each Year for Men and Woman based on Product Reviews

 df = dim_category_nike_python.copy()

#print(df)

product = dim_product_nike_python.copy()

product = product.merge(df,on='category_id',how='inner')

product = product[['order_date','gender','category_name','product_reviews']]

product['order_date'] = pd.to_datetime(product['order_date']).dt.year

product=product.groupby(['order_date','gender','category_name'])['product_reviews'].mean().reset_index()

product['top_rank']=product.groupby(['order_date','gender'])['product_reviews'].rank(ascending=False)

product['bottom_rank']=product.groupby(['order_date','gender'])['product_reviews'].rank(ascending=True)

new_df = product[(product['top_rank']==1)|(product['bottom_rank']==1)]

new_df = new_df.copy()

new_df.loc[:,'Category_type'] = new_df.apply(lambda row: 'Top' if row['top_rank']== 1 else 'Bottom',axis=1 )

grouped  =new_df.groupby(['order_date','gender','Category_type'])['category_name'].first().reset_index()

pivot_df = grouped.pivot(index='order_date',columns=['gender','Category_type'],values='category_name')

pivot_df.columns = [  f"{gender}_{abc}_Category"  for gender,abc in pivot_df.columns ]

pivot_df = pivot_df.reset_index()

column = {'men_Bottom_Category':'Men_Bottom_Category',

    'woman_Top_Category':'Woman_Top_Category',

    'woman_Bottom_Category':'Woman_Bottom_Category',

    'men_Top_Category':'Men_Top_Category',

    'order_date':'order_year'

    

}

pivot_df=pivot_df.rename(columns = column)

#print(product[product['order_date']==2020])

print(pivot_df)