This script counts and summarizes the file extensions of all files in the current working directory.

extension_counter.py

#!/usr/bin/env python3

import os
import pathlib
from operator import itemgetter

resume = {}
for filename in os.listdir():
    if os.path.isfile(filename):
        file_extension = pathlib.Path(filename).suffix or 'not extension'
        if file_extension in resume:
            resume[file_extension] += 1
        else:
            resume[file_extension] = 1

sorted_resume = dict(sorted(resume.items(), key=itemgetter(1), reverse=True))

for extension, count in sorted_resume.items():
    print(f"{extension}: {count} files")

# run it with python3 extension_counter.py
# or add add execute permission to file by sudo chmod +x extension_counter.py then mv file to /usr/local/bin after that run the script with extension_counter.py