Find files with same name but different extensions

same_ext.py

#!/usr/bin/env python3

import argparse
import collections
import os
from os import path

ExtInfo = collections.namedtuple('ExtInfo', ['ext', 'path'])

arg_parser = argparse.ArgumentParser(description='Find results with same name but different extension.')
arg_parser.add_argument('path', default='.', nargs='?', help='path where to start looking')
arg_parser.add_argument('-R', '--recursive', action='store_true', help='search results recursively')
arg_parser.add_argument('-n', '--no-print', metavar='EXT', required=False, help='do not print .EXT files')

args = arg_parser.parse_args()


results = {}


def track_file(parent_dir, filename):
    base_name, ext = path.splitext(filename)

    if ext == '':
        return

    if base_name not in results:
        results[base_name] = []
    results[base_name].append(ExtInfo(ext, parent_dir))


if not args.recursive:
    with os.scandir(args.path) as dir:
        for entry in dir:
            if entry.is_file():
                track_file(args.path, entry)
else:
    for root, _, files in os.walk(args.path):
        for f in files:
            track_file(root, f)

for f, infos in results.items():
    if len(infos) == 1:
        # This filename has just one extension
        continue
    for info in infos:
        if info.ext == '.' + args.no_print:
            continue
        print(path.join(info.path, f + info.ext))