Help with learning threading please.

[jarrod0987]

I wrote a short test program to learn how to make threads. Right now there is only 1 thread. Going to increase that once I get it working.
It is throwing and error and I am not sure what I am doing wrong. Please advise. Thanks.

#Threading Test2 v1.0
from random import randint
import time, threading


def main():
    times = []
    for x in range(10):
        targetVar = 0
        start = time.time()
        t = threading.Thread(target = varUpdater, name = 'Thread1', args = (targetVar))
        t.start()
        
        end = time.time()
        times.append(end - start)
    average = (sum(times)/ len(times))
    print (average)
    

def varUpdater(targetVar):
    var = randint(0, 100)
    time.sleep(0.01)
    if var > targetVar:
        return var
    else:
        return targetVar

if __name__ == '__main__':
    main()

Error:
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
0.0006911277770996094Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int


Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int
Exception in thread Thread1:
Traceback (most recent call last):
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "C:\Users\jarrod0987\AppData\Local\Programs\Python\Python36-32\lib\threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
TypeError: varUpdater() argument after * must be an iterable, not int