Calculator created by victor_slimak - https://repl.it/OE3c/10

Calculator.py

import random
#Variables
num1 = 0
num2 = 0
opr = "+"
answer = 0
reply = ""
replynum= random.randrange(0,4) 

while True:
  if replynum == 1:
    reply=("You messed up")
  elif replynum == 2:
    reply=("Write an Operator")
  elif replynum == 3:
    reply=("Do it properly")
    
  #Getting numbers
  num1 = float(input("First Number"))
  opr = input("Write Operator")
  num2 = float(input("Second Number"))
  
  #Working out answer 
  if opr == "+":
    answer = num1 + num2
  
  elif opr == "-":
    answer = num1 - num2
  
  elif opr == "*":
    answer = num1 * num2
  
  elif opr == "/":
    answer = num1 / num2
    
  else:
    print(reply)
    
  #Output answer 
  print("Answer:" , answer)