Solving group argument error in threading

Question

I am using threading to download,convert videos and delete it. However, when I use threading, it gives me an error AssertionError: group argument must be None for now Threading worked fine until 3 runs before but it is suddenly showing this error.

I thought the group argument was default None but I just added 'group = None' into the parameter. Now it shows an error saying TypeError: __init__() got multiple values for argument 'group'

def video_download(parent_file, url):
    #checking if it succeed or not for logging
    fail = []
    success = []
    #which number in the list the program is in
    check = 1

    #check if the url is playlist or single video
    if url.find("list") != -1:
        pl = Playlist(url)
        links = pl.parse_links()
        #length of list
        total = len(links)
        print("\n start download")
        for l in links:
            t1 = threading.Thread(l,target= download_multi, group = None, args=(l,check,parent_file,success,fail,total))
            t1.start()
            time.sleep(1)
            t2 = threading.Thread(target= download_multi, group = None, args=(l,check,parent_file,success,fail,total))
            t2.start()
            time.sleep(1)
            t3 = threading.Thread(target= download_multi, group = None, args=(l,check,parent_file,success,fail,total))
            t3.start()
            time.sleep(1)
            t1.join()
            t2.join()
            t3.join()

Error code without group = None

  File "C:\Program Files\JetBrains\PyCharm Community Edition 2019.2\helpers\pydev\pydevd.py", line 2060, in <module>
    main()
  File "C:\Program Files\JetBrains\PyCharm Community Edition 2019.2\helpers\pydev\pydevd.py", line 2054, in main
    globals = debugger.run(setup['file'], None, None, is_module)
  File "C:\Program Files\JetBrains\PyCharm Community Edition 2019.2\helpers\pydev\pydevd.py", line 1405, in run
    return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)
  File "C:\Program Files\JetBrains\PyCharm Community Edition 2019.2\helpers\pydev\pydevd.py", line 1412, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "C:\Program Files\JetBrains\PyCharm Community Edition 2019.2\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "C:/Users/paulm/Desktop/Github/git/YoutubeDownloader/main.py", line 179, in <module>
    recieve_input()
  File "C:/Users/paulm/Desktop/Github/git/YoutubeDownloader/main.py", line 37, in recieve_input
    video_download(parent_file, url)
  File "C:/Users/paulm/Desktop/Github/git/YoutubeDownloader/main.py", line 102, in video_download
    t1 = threading.Thread(l,target= download_multi, args=(l,check,parent_file,success,fail,total))
  File "C:\Users\paulm\AppData\Local\Programs\Python\Python37-32\lib\threading.py", line 786, in __init__
    assert group is None, "group argument must be None for now"
AssertionError: group argument must be None for now

Error code with group = None

Traceback (most recent call last):
  File "C:/Users/paulm/Desktop/Github/git/YoutubeDownloader/main.py", line 179, in <module>
    recieve_input()
  File "C:/Users/paulm/Desktop/Github/git/YoutubeDownloader/main.py", line 37, in recieve_input
    video_download(parent_file, url)
  File "C:/Users/paulm/Desktop/Github/git/YoutubeDownloader/main.py", line 102, in video_download
    t1 = threading.Thread(l,target= download_multi, group = None, args=(l,check,parent_file,success,fail,total))
TypeError: __init__() got multiple values for argument 'group'

Problem solved. The first thread had an typo and after fixing that it worked perfectly.

Answer 1

the t1 = threading.Thread(l,target= line is not consistent with t2 and t3

the extra l was wrongly taken as the default value for group arg

typo?