Use nicer prompts

calc.py

-operand1 = int(input())
-operator = input()
-operand2 = int(input())
+operand1 = int(input("First operand: "))
+operator = input("Operator: ")
+operand2 = int(input("Second operand: "))
 
 if operator == "+":
     print(operand1 + operand2)