Simple Member Registration System using Python

import os import platform global listStd listStd = ["John Smith", "Claire Temple", "Steve Roger"] def manageMember(): print(""" --------------------------------------------------------- |========================================================| |======== Welcome To Member Registration System =========| |========================================================| --------------------------------------------------------- Enter 1 : To View Member List Enter 2 : To Register New Member Enter 3 : To Search Member Enter 4 : To Remove Member """) try: userInput = int(input("Please Select An Above Option: ")) except ValueError: exit("\nHy! That's Not A Number") else: print("\n") if(userInput == 1): print("List of Members\n") for members in listStd: print("=> {}".format(members)) elif(userInput == 2): newStd = input("Enter New Member: ") if(newStd in listStd): print("\nThis Member {} Already In The Database".format(newStd)) #Error Message else: listStd.append(newStd) print("\n=> New Member {} Successfully Add \n".format(newStd)) for members in listStd: print("=> {}".format(members)) elif(userInput == 3): srcStd = input("Enter Member Name To Search: ") if(srcStd in listStd): print("\n=> Record Found Of Member {}".format(srcStd)) else: print("\n=> No Record Found Of Member {}".format(srcStd)) elif(userInput == 4): rmStd = input("Enter Member Name To Remove: ") if(rmStd in listStd): listStd.remove(rmStd) print("\n=> Member {} Successfully Deleted \n".format(rmStd)) for members in listStd: print("=> {}".format(members)) else: print("\n=> No Record Found of This Member {}".format(rmStd)) elif(userInput < 1 or userInput > 4): print("Please Enter Valid Option") manageMember() def runAgain(): runAgn = input("\nContinue Transaction? y/n: ") if(runAgn.lower() == 'y'): manageMember() runAgain() else: quit() runAgain()