Filenames to CSV

Python script for writing all filenames in the selected folder to ‘Filenames.csv’.

import glob
from tkinter import Tk
from tkinter import filedialog

def FileList(filepath):
    return glob.glob(str(filepath) + '*')

Tk().withdraw()     
folderpath_user=filedialog.askdirectory()

if folderpath_user.endswith('\\'):
    folderpath=folderpath_user
else:
    folderpath=str(folderpath_user)+ '\\'
    
with open('Filenames.csv', 'w') as f:
    f.write('{0},{1}\n'.format("Filepath","Filename"))    
    for file in FileList(folderpath):
        f.write('{0},{1}\n'.format(file,file.split("\\")[1]))