python3 List all processes, sort by number of open files

openfiles.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""List all processes, sort by number of open files."""
from collections import Counter

import psutil


def main():
    """Run main function."""
    cntr = Counter()
    pmap = {}
    for i in psutil.pids():
        proc = psutil.Process(i)
        name = proc.name()
        pmap[name] = proc
        try:
            pcnt = proc.num_fds()
            cntr[name] += pcnt
        except psutil.AccessDenied:
            pass
    total = sum(cntr.values())
    print(f"Total number of file descriptors: {total}")
    for k, v in cntr.most_common():
        proc = pmap[k]
        print(f"{k:<20} {v:>5} pid:{proc.pid}")


if __name__ == "__main__":
    main()