Python dataframe: how to remove first column (row number)

November 1, 2022

I have manually constructed the dataframe (df1,code below).
For this dataframe df1, how could I remove the first column (row number)?
Many thanks in advance

df1 = pd.DataFrame({"date": ['2021-3-22', '2021-4-7', '2021-4-18', '2021-5-12'],
"x": [3, 3, 3, 0 ]})

Output:
date    x
0   2021-3-22   3
1   2021-4-7    3
2   2021-4-18   3
3   2021-5-12   0

>Solution :

Simply use set_index method.

import pandas as pd

df1 = pd.DataFrame({"date": ['2021-3-22', '2021-4-7', '2021-4-18', '2021-5-12'],
"x": [3, 3, 3, 0 ]})

df1.set_index('date', inplace=True)