How do I convert a for loop to a vector and write that to a csv?

Question

I have created a for loop which extracts all my files from my path and prints the same. I wanted to put this entire functions output into a dataframe and write it to a csv. I know we can do this in R by creating a vector but how do we do it in python?

import pandas
import glob

for filepath in glob.iglob('*.csv'):
    fl = pandas.read_csv(filepath);
    fl.insert(25,'city',filepath)
    print(fl.groupby('city').mean())

Answer 1

Your f1 variable is already a DataFrame. To output it into a csv file on the same directory just use the to_csv methond from pandas.DataFrame.

f1.to_csv('filename.csv')