Working On A Simple 'Trader' Class in Python

import random
class Trader:
    def __init__(self, a, b, c):
        self.Stock_a=a
        self.Stock_b=b
        self.Stock_c=c
       
     
       
       
    def PriceDictionary(Stock_a, Stock_b, Stock_c):
        stock={Stock_a, Stock_b, Stock_c}
        stock[Stock_a]=randomP()
        stock[Stock_b]=randomP()
        stock[Stock_c]=randomP()
   
       
    def returns(self):
        b=self.a * self.a
        print(b)
   
    def randomP():
        return (random.random()*100)
       
    def randomR():
        return (random.random()+1)
           
    def printStocks(self):
        print("Trader is holding these stocks: %s, %s & %s" % (self.Stock_a, self.Stock_b, self.Stock_c))