Deletes all files that are missing a given string in their name

file_cleaner.py

# Hey everyone, I was having a tough time cleaning up my ROMs, as there would be multiple versions of the same game, like:

#     Super-Smash(Japan).rom
#     Super-Smash(Europe).rom
#     Super-Smash(USA).rom

# I ended up writing this small Python (3.6) script that you can use to cleanup duplicate files.

# Execution looks like this, if you want to keep only USA files:

#     python3.6 file_cleaner.py "USA" /path/to/ROMs --dry

# Some sample output may look like this:

#     Dry run detected, no modifications will be made

#     Would delete:

#     'test/JAPAN_file.zip'

#     Would delete 1 files out of 2 files

# I suggest running with

#     --dry

# at first to verify output.

# I hope this helps someone!

# Also, obligatory: I take no responsibility for usage of this script, use at your own risk.

import sys
import os

directory_path = ""
substring = ""
dry_run = False

if len(sys.argv) == 2 and sys.argv[1] == "--opt":
    print("$ python3 [substring that must be in files] [path to directory] [--dry for dry run]")
    sys.exit(-1)

if len(sys.argv) < 3:
    print("Missing substring to match against or directory to run in")
    sys.exit(-2)

substring = sys.argv[1]
# print(f"substring detected: '{substring}'")

directory_path = sys.argv[2]
# print(f"directory_path detected: '{directory_path}'")

if len(sys.argv) == 4 and sys.argv[3] == "--dry":
    print("Dry run detected, no modifications will be made")
    dry_run = sys.argv[2]
else:
    print("Live run detected, modifications will be made")

if not dry_run:
    while(input("Continue? [y]") != 'y'):
        continue

directory = os.fsencode(directory_path).decode("utf-8")

total_count = 0
delete_count = 0

if dry_run:
    print("Would delete:")
else:
    print("Deleting:")

for file in os.listdir(directory):
    total_count += 1
    filename = os.fsdecode(file)
    if substring not in filename:
        delete_count += 1

        full_file_path = os.path.join(directory, filename)

        print(f"\t'{full_file_path}'")

        if not dry_run:
            os.remove(full_file_path)

if dry_run:
    print(f"Would delete {delete_count} files out of {total_count} files")
else:
    print(f"Deleted {delete_count} files out of {total_count} files")