Python - Teams Class

import random
import json

class Player():

    def __init__(self, *args):
        pass

class Teams():

    # color - tuple, wins - int, losses - int
    def __init__(self, teamname="unknown", wins=0, losses=0, team1player="unknown", team2player="unknown", colour=(255,255,255)):
        #above I have created all the attributes of teams
        self.teamname = teamname #sets teamname

        self.team1composition = {
            'point guard' : [],
            'shooting guard': [],
            'small forward': [],
            'power forward': [],
            'centre': []
        }

        self.team2composition = {
            'point guard': [],
            'shooting guard': [],
            'small forward': [],
            'power forward': [],
            'centre': []
        }

        self.wins = wins #number of wins
        self.losses = losses #number of losses

        self.team1player = team1player #holds a player and can be used to create players I have made this here so that the players are a part of the team
        self.team2player = team2player

        self.colour = colour #holds the rgb colour specific to the team

        # predefined teams
        self.all_teams = {
            "CAVS": {
                "name": "Cleveland Cavaliers",
                "color": (134, 0, 56),
                "composition": {
                    'point guard': ['Jose Calderon'],
                    'shooting guard': ['J.R Smith'],
                    'small forward': ['LeBron James'],
                    'power forward': ['Jae Crowder'],
                    'centre': ['Kevin Love'],
                },
            },
            "GSW": {
                "name": "Golden State Warriors",
                "color": (0, 107, 182),
                "composition": {
                    'point guard': [],
                    'shooting guard': [],
                    'small forward': [],
                    'power forward': [],
                    'centre': []
                },
            },
        }

    # you can use module `json` to save in file and/or read from file
    def save_data(self):
        with open("teams.json", "w") as f: # "w" = write
            json.dump(self.all_teams, f) # save

    def read_data(self):
        with open("teams.json") as f: # "" = read
            self.all_teams = json.load(f) # load
            print(self.all_teams)

    def startTeam(self):

        while True:
            Team1Name = input("Please select a team // GSW or CAVS: ")
            if Team1Name.upper() == "GSW":
                # get data from predefined teams
                Team1Name = self.all_teams["GSW"]["name"]
                Team1Colour = self.all_teams["GSW"]["color"] #rgb colour for GSW yellow
                self.team1composition = self.all_teams["GSW"]["composition"]
                break # exit while loop
            elif Team1Name.upper() == "CAVS":
                # get data from predefined teams
                Team1Name = self.all_teams["CAVS"]["name"]
                Team1Colour = self.all_teams["CAVS"]["color"] #rgb colour for GSW yellow
                self.team1composition = self.all_teams["CAVS"]["composition"]
                break # exit while loop
            print("*** wrong team, try again ***")

        while True:
            Team2Name = input("Please select an opposing team // GSW or CAVS: ")
            if Team2Name.upper() == "GSW":
                # get data from predefined teams
                Team2Name = self.all_teams["GSW"]["name"]
                Team2Colour = self.all_teams["GSW"]["color"] #rgb colour for GSW yellow
                self.team2composition = self.all_teams["GSW"]["composition"]
                break
            elif Team2Name.upper() == "CAVS":
                # get data from predefined teams
                Team2Name = self.all_teams["CAVS"]["name"]
                Team2Colour = self.all_teams["CAVS"]["color"] #rgb colour for GSW yellow
                self.team2composition = self.all_teams["CAVS"]["composition"]
                break
            print("*** wrong team, try again ***")

        print('--- TEAM 1 ---')
        self.team1players = []
        for position , name in self.team1composition.items():
            print(position, name)
            self.team1players.append(Player(name, 15, random.randint(0,470), random.randint(0,500), Team1Colour, 0, Team1Name, 0.01, 30))

        print('--- TEAM 2 ---')
        self.team2players = []#
        for position, name in self.team2composition.items():
            print(position , name)
            self.team2players.append(Player(name, 15, random.randint(470,940), random.randint(0,500), Team2Colour, 0, Team2Name, 0.01, 30))

#----------------------------------------------------------------------

t = Teams()
t.startTeam()

print('- save predefined teams -')
t.save_data()

print('- read predefined teams -')
t.read_data()