Retry inputs when given bad input

calc.py

+
+parsed = False
+
 operand1 = input("First operand: ")
-operator = input("Operator: ")
-operand2 = input("Second operand: ")
+while not parsed:
+    try:
+        operand1 = int(operand1)
+        parsed = True
+    except ValueError:
+        print(operand1 + " is not a number!")
+        operand1 = input("First operand: ")
 
-try:
-    operand1 = int(operand1)
-except ValueError:
-    print(operand1 + " is not a number!")
-    exit(1)
+operator = input("Operator: ")
 
-try:
-    operand2 = int(operand2)
-except ValueError:
-    print(operand2 + " is not a number!")
-    exit(1)
+operand2 = input("Second operand: ")
+while not parsed:
+    try:
+        operand2 = int(operand2)
+        parsed = True
+    except ValueError:
+        print(operand2 + " is not a number!")
+        operand2 = input("Second operand: ")
 
 print("Your result is:")
 if operator == "+":