[Python] Problem when running Python rock, paper and scissors game code [closed]

I am trying to write a simple program that simulates a rock, paper, scissors game. When trying to run the code for the first time, the system returns an error:

Traceback (most recent call last):
File "C:/Users/RRM/Documents/Python/rockpaperScissors.py", line 40, in <module>
computerMove == 's'
NameError: name 'computerMove' is not defined


What's funny is, it only happens when I run the codes from the code editor (IDLE) for the first time. If I ignore this error and re-run the codes again, the problem is gone and the game works as intended.

Below are my codes:

import random, sys

print('ROCK, PAPER, SCISSORS')

#these variables keep track of the number of wins, losses, and ties

wins = 0
losses = 0
ties = 0

while True: #the main game loop
print('%s Wins, %s Losses, %s Ties' % (wins, losses, ties)) #assign the symbol '%' to wins, losses and ties
while True: #the player input loop (to make the player type either 'r','p','s' or 'q')
print('Enter your move: (r)ock (p)aper (s)cissors or (q)uit')
playerMove = input()
if playerMove == 'q':
sys.exit() #quit the program
elif playerMove == 'r' or playerMove == 'p' or playerMove == 's':
break #break out of the loop of telling the player to type either 'r','p','s' or 'q'
else:
print('Please choose between r, p, and s.')

#display what the player chooses
if playerMove == 'r':
print('ROCK versus ...')
elif playerMove == 'p':
print('PAPER versus ...')
elif playerMove == 's':
print('SCISSORS versus ...')

#display what the computer choose
randomNumber = random.randint(1,3)
if randomNumber == 1:
computerMove = 'r'
print('ROCK')
elif randomNumber == 2:
computerMove = 'p'
print ('PAPER')
elif randomNumber == 3:
computerMove == 's'
print ('SCISSORS')

#Result of the round
if playerMove == computerMove:
print('TIE')
ties = ties + 1
elif playerMove == 'r' and computerMove == 's':
print('WIN')
wins = wins + 1
elif playerMove == 'r' and computerMove == 'p':
print('LOSE')
losses = losses + 1
elif playerMove == 'p' and computerMove == 'r':
print('WIN')
wins = wins + 1
elif playerMove == 'p' and computerMove == 's':
print('LOSE')
losses = losses + 1
elif playerMove == 's' and computerMove == 'p':
print('WIN')
wins = wins + 1
elif playerMove == 's' and computerMove == 'r':
print('LOSE')
losses = losses + 1


I don't understand why the system told me that the name computerMove in computerMove == 's' is not defined. It is clearly defined as 's' or scissors when the program picks the number 2.

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