removes all file in current directory except for the ones mentioned - hence the name - rm EXCEPT

rme.py

#!/usr/bin/env python3
import os
import sys

NAME = 'rme'
USAGE = 'usage: {} [FILE]...'.format(NAME)

args = sys.argv # simply because I don't like 'argument vector'

if len(args) == 1:
    print('rm: missing operand')
    print(USAGE)
    exit(1)

del args[0] # remove the first argument that is the file that was executed

current_dir_files = os.listdir('.')

if '--help' in args or '-h' in args:
    print(USAGE)
    print('removes all files / directories in current file except the ones mentioned')
    exit(0)

for file in args:
    if file not in current_dir_files:
        print('file {} doesn\'t exist in current directory. please check again.'.format(file))

files = [file for file in os.listdir() if file not in args] # args is now only the files provided

for file in files:
    try:
        if os.path.isdir(file):
            os.rmdir(file)
            continue
        os.remove(file)
    except Exception as e:
        print('an unknown exception occured:\n{}'.format(e))