How to drop double header resulting from pivot in Pandas?

Problem

I’ve done a pivot table in pandas, but I end up with a double header when I export to csv.

import pandas as pd

df = pd.DataFrame({'Year': [1, 2, 3, 4, 1, 2, 3, 4],
                   'Product': ['A', 'A', 'A', 'A', 'B', 'B', 'B', 'B'],
                   'net_sales': [55, 40, 84, 31, 56, 78, 34, 12]})
pvt_df = pd.pivot_table(df, values=['net_sales'], index=['Year'], columns=['Product'])
pvt_df.to_csv('sales.csv')

Which looks like below:

        net_sales   net_sales
Product A           B
Year        
1       55          56
2       40          78
3       84          34
4       31          12

Desired Result

What can I do to make the CSV export look like below?

Year    A           B
1       55          56
2       40          78
3       84          34
4       31          12

>Solution :

You can try

pvt_df = pd.pivot_table(df, values='net_sales', index='Year', columns='Product').reset_index()
pvt_df.to_csv('sales.csv',index=False)