Takes 0 positional arguments but 2 were given, when it is not the case

Question

SOLVED, answer below!

Here is the relevant fragment of the code:

def redraw() -> int:
    subprocess.call(['tput', 'reset'])
    cursor.hide()
    print(get_time())
    return 0


def main() -> int:
    """
    Main function
    """
    time_between_updates = 0.5
    signal.signal(signal.SIGWINCH, redraw)

    old = ""
    while True:
        try:
            current = get_time()
            if old != current:
                redraw()
            old = get_time()
            time.sleep(time_between_updates)
        except KeyboardInterrupt:
            cursor.show()
            return 0

And the WEIRD error from the interpreter:

$: python3 .local/my_scripts/pytime

Traceback (most recent call last):
  File "/home/omega/.local/my_scripts/pytime", line 176, in <module>
    main()
  File "/home/omega/.local/my_scripts/pytime", line 169, in main
    time.sleep(time_between_updates)
TypeError: redraw() takes 0 positional arguments but 2 were given

The higlighted line 169: time.sleep(time_between_updates) doesn't even call redraw() and I can confirm all calls to redraw() in the entire file are done with no arguments, consistent with it's definition.

I don't really get what's happening. I'd love if I could get any help on this. Thanks!

Fixed by creating the function:

def redraw_wrapper(signum, frame):
    redraw()

and using that instead of redraw() in the line:

-  signal.signal(signal.SIGWINCH, redraw)
+  signal.signal(signal.SIGWINCH, redraw_wrapper)

This way redraw_wrapper is called when SIGWINCH is captured but I can still call redraw manually in any other case.

Answer 1

Change to:

def redraw(signum, frame) -> int: