[spyder] How do you flush stdout?

[rssail]

I have the following:

import sys 
import os 
class Portfolio: 
    @classmethod 
    def menu(cls): 
        print("Main Menu") 
       p = Portfolio() 
       p.clear_screen()  
       p.transaction() 

    def clear_screen(self): 
        os.system('cls' if os.name == 'nt' else 'clear') 
         print(flush=True) 
        sys.stdout.flush() 

    def transaction(self): 
         print("Transaction Menu") 

if __name__ == "__main__" : Portfolio.menu()

When I run this the screen clears AFTER not BEFORE transaction() is run. 
How can I correct that?

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