Program not running with error unsupported operand type(s) for +: 'function' and 'int' - python-3.7

Question

Im creating a program for NIM for my Python Intro class, and am having a problem with trying to get the program to finish.
I am at a loss...
def main():
import random
#User random to generate integer between 10 and 100 for random pile size of marbles.
ballCount = random.randint(10, 100)
print("The size of the pile is: ",ballCount)
#Generate a random integer between 0 and 1, this will tell if the human or computer takes first turn.
def playerTurn(ballCount):
playerTurn = random.randint(0, 1)
if playerTurn == 0:
print("Its the computers turn...")
else:
print("Its your turn...")
#Generate a random integer between 0 and 1, to determine if the computer is smart or dumb.
computerMode = random.randint(0, 1)
def computerDumbMode(ballCount):
computerMode = random.randint(0, 1)
if computerMode == 0:
print("This computer is very dumb, no need to stress")
def computerSmartMode(ballCount):
computerMode = random.randint(0, 1)
if computerMode == 1:
print("This computer is very intelligent, beware")
#In dumb mode the computer generates random values (between 1 and n/2),
#you will use a random integer n for ballCount, when it is the computers turn.
while ballCount != 1: #This will compile untill you are left with only one marble.
if playerTurn == 0: #This will initiate computers turn.
if computerMode == 1: #This will initiate Smart Mode.
temp = random.randint(1, ballCount/2) #Pick a random number between 1, and n/2.
else: # Pick your own number of Marbles for your ballCount (n).
if ballCount - 3 > 0 and ballCount - 3 < ballCount/2:
temp = ballCount - 3
elif ballCount - 7 > 0 and ballCount - 7 < ballCount/2:
temp = ballCount - 7
elif ballCount - 15 > 0 and ballCount - 15 < ballCount/2:
temp = ballCount - 15
elif ballCount - 31 > 0 and ballCount - 31 < ballCount / 2:
temp = ballCount - 31
else:
temp = ballCount - 63
print("The computer has chosen: %d marbles." % temp) #Print the number of marbles the computer has chosen.
ballCount -= temp #Then subtract the number of marbles chosen by the computer.
else:
ballCountToPick = int(input("It is now your turn, Please pick the number of marbles in the range 1 - %d: " % int(ballCount/2))) #Reads the number of marbles to be picked by user.
while ballCountToPick < 1 or ballCountToPick > ballCount/2: #If computer reads this invalidly, it will try repeatedly.
ballCountToPick = int(input("The number you chose, is incorrect. Try again, and pick marbles in the range 1 - %d: " % int(ballCount/2)))
ballCount -= ballCountToPick #Subtract the marbles that were chosen by user.
playerTurn = (playerTurn + 1) % 2 #Changes the turn of player.
print("Now the pile is of size %d." % ballCount)
if playerTurn == 0: #Show the outcome.
print("You came, you saw, and you won... CONGRATULATIONS!!!")
else:
print("Once again... You lost and the computer wins!!!")
main()
Trying to get the program/game to run and print end result if the computer or person wins!

Answer 1

Your "playerTurn" variable is a function in the following line:
playerTurn = (playerTurn + 1) % 2 #Changes the turn of player.
Have a separate "playerTurn" function and "player_turn" variable will resolve your problem.