downtube with clipboard check

import pytube
import clipboard
import time
import sys


class DownTube:
    def __init__ (self, mode="listen"):        
        mode = sys.argv[1][1:]        
        if mode=="listen":
            self.clear_list_file()
            print("Waiting for links in clipboard...")
            self.add_links()
        elif mode == "download":
            self.download()


    def clear_list_file(self):
        file = open("tunes_list.txt", "w")
        file.close()
        

    def count_list(self):
        return len(open("tunes_list.txt", "r").readlines())
    
            
    def check_duplicates(self, address):
        with open("tunes_list.txt", "r") as file:
            for line in file.readlines():            
                if line.strip() == address:
                    print("Link already on the list...")
                    return False
        return True
    

    def add_links(self):
        current = clipboard.paste()
        while True:    
            if current != clipboard.paste():
                current = clipboard.paste()
                if current.find("https://youtu.be/") != -1 and self.check_duplicates(current):           
                    with open("tunes_list.txt", "a") as file:
                        file.write(current+"\n")                      
                        print("Added new link to links list")
            time.sleep(1)   
        
    
    def download(self):
        counter = self.count_list()        
        with open("tunes_list.txt", 'r') as line:
            for nr, link in enumerate(line.readlines(), 1):
                link = link.strip()
                try:                    
                    yt = pytube.YouTube(link)
                    print(f"Download... {nr}/{counter} - '{yt.title}'")
                    yt.streams.get_by_itag(140).download("e:\\muza\\")
                except Exception as e:                    
                    print("Download failed: ", nr)
                    print(e)
                    return False
        self.clear_list_file()
        input("Finished, list cleared... press Enter.")


if __name__ == "__main__":
    downtube = DownTube()