Concat function not giving desired result-CodePudding

I want to add dataframe to excel every time the code executes, in the last row available in the sheet. Here is the code I am using:

import pandas as pd
import pandas
from openpyxl import load_workbook

def append_df_to_excel(df, excel_path):
    df_excel = pd.read_excel(excel_path)
    result = pd.concat([df_excel, df], ignore_index=True)
    result.to_excel(excel_path)

data_set1 = {
    'Name': ['Rohit', 'Mohit'],
    'Roll no': ['01', '02'],
    'maths': ['93', '63']}

df1 = pd.DataFrame(data_set1)
append_df_to_excel(df1, r'C:\Users\kashk\OneDrive\Documents\ScreenStocks.xlsx')

My desired output(after 3 code runs):

Rohit   1   93
Mohit   2   63
Rohit   1   93
Mohit   2   63
Rohit   1   93
Mohit   2   63

But what I get:

    Unnamed: 0.1    Unnamed: 0  Name    Roll no maths
0       0                  0    Rohit   1       93
1       1                  1    Mohit   2       63
2       2                       Rohit   1       93
3       3                       Mohit   2       63
4                               Rohit   1       93
5                               Mohit   2       63

Not sure where I am going wrong.

CodePudding user response：

It's happening because in a default situation these functions like to_excel or to_csv (and etc.) add a new column with index. So every time you save the file, it adds a new column. That's why you just should change the raw where you save your dataframe to a file.

result.to_excel(excel_path, index=False)