如何避免每次我在 Pandas 中重复标题 append

Question

Im trying to append values from stored values taken from users. Is there a way to hard code the headers ("Player Name", "Age" and "Number") so evertime I run the code these headers dont appear again in the csv.

Edit: I want the headers to appear the "First time" it runs and not the ones after

data = {'Player Name': [playersNames[0]],
        'Age': [Age[0]],
        'Number': [number],

        df = pd.DataFrame(data)
        df.to_csv("Info.csv",mode='a',index=False, header=True)
        print(df)

At the moment it does this:

Player Name,Age,Number
x,15,73
Player Name,Age,Number
y,25,70

Answer 1

Try:

import pathlib

csvfile = pathlib.Path('Info.csv')
df.to_csv(csvfile, mode='a', index=False, header=not csvfile.exists())

Answer 2

If you don't want the header to be appended as well, then set headers=False in your call to to_csv .

In this situation, if you are running the script multiple times but only want headers appended on the first execution, then you could check if the file exists.

import os
exists = os.path.exists('Info.csv')

Then, set headers=not exists when calling to_csv .

Docs here .