Remove duplicated files in a folder

main.py

import os
import sys


def get_folder() -> str:
    args = sys.argv
    if len(args) != 2 or not os.path.isdir(args[1]):
        print("a folder must be set as the first argument")
        sys.exit(1)
    return sys.argv[1]


def is_copy(file: os.DirEntry) -> bool:
    return file.is_file() and not file.name.startswith("copy") and " copy" in file.name


def delete_confirmation(files: list[str]) -> bool:
    if not files:
        print("No duplicated files found")
        return False
    
    print(f"You are about to delete {len(files)} files:")
    
    for i in files:
        print(i)
    
    delete_confirmation = input("Confirm? [y/Y for 'yes']")
    return delete_confirmation.lower() == "y"

folder = os.scandir(get_folder())
files = [i.path for i in folder if is_copy(i)]

if delete_confirmation(files):
    for i in files:
        os.remove(i)