Select all txt files in a folder, count lines and write the result in csv

count_lines.py

import csv
import copy
import os
import sys
import glob

os.chdir(r"FOLDER_PATH")
names={}
for fn in glob.glob('*.txt'):
    with open(fn, encoding="utf8") as f:
        names[fn]=sum(1 for line in f if line.strip())    

print(names)

with open('countlines.csv', 'w') as csv_file:
    writer = csv.writer(csv_file)
    for key, value in names.items():
       writer.writerow([key, value])