invalid syntax on a "return" on Python [closed]

I am fairly new to python and I am trying to make a rock, paper, scissors game, with one player vs the computer. I have made a dictionary for the winning conditions and a function for the PC to choose its random option from said dictionary. This is my code so far (not finished yet but it is what I have done so far):

import random 

WinConditions = {"paper":"rock", "scissors":"paper", "rock":"scissors"}

def Player():
  selection = input ("Write Rock, Paper or Scissors and Press Enter.")
  if selection.lower() not in WinConditions.keys():
    print ("You did not select a valid option!")
    Player()
  else:
    return selection

def PC():
  PCselection = random.choice((list(WinConditions.keys()))
  return (PCselection)

def rock_paper_scissors():
  Player1 = Player()
  Computer = PC()

The first problem I have encountered is on the PC() function, it gives my Syntax Error on the return part. Why is that?