Volleyball game

[DrewD]

I get a none type object is not utterable error. I am not sure why.

def match(Home, Visitor, matchnum):
      print("Match", str(matchnum))
      scorehome = int(input("Enter the number of points "+Home+" got in Match "+str(matchnum)+": "))
      scorevisitor = int(input("Enter the number of points "+Visitor+" got in Match "+str(matchnum)+": "))
      

def printScoreCard(Home,Visitor,winhome,winvisitor):
      print(Home,winhome)
      print(Visitor, winvisitor)

      
def wrong_score():
      if ((scorehome > scorevisitor) and scorehome < 25):
            print("One team must score 25 points. Please enter scores again.")
            return False
      elif ((scorevisitor > scorehome) and scorevisitor < 25):
            print("One team must score 25 points. Please enter scores again.")
            return False
      elif ((scorehome > scorevisitor) and scorehome - scorevisitor < 2):
            print("One team must win by 2 points. Please enter scores again.")
            return False
      elif ((scorevisitor > scorehome) and scorevisitor - scorehome < 2):
            print("One team must win by 2 points. Please enter scores again.")
            return False
      elif scorehome > scorevisitor:
            winhome=winhome+1
            return True
      else:
            scorevisitor > scorehome
            winvisitor= winvisitor+1
            return True          

      
def startgame():
      print("Welcome to the volleyball score program.")
      Home = input("Enter the home team's name: ")
      Visitor = input("Enter the visitor's team name: ")
      winhome = 0
      winvisitor = 0
      for i in range(5):
            while True:
                  scorehome,scorevisitor=match(Home, Visitor,i+1)
                  if wrong_score():
                        break
                  if scorehome > scorevisitor:
                     winhome=winhome+1
                  else:
                     winvisitor=winvisitor+1    
            printScoreCard(Home,Visitor,winhome,winvisitor)
            
      if winhome>winvisitor:
            print(Home+" wins the game!")
      else:
            print(Visitor+" wins the game!")      
startgame()