create python calculator

Cal.py

@@ -0,0 +1,41 @@
+def add(num1, num2):
+    return num1 + num2
+
+def subtract(num1, num2):
+    return num1 - num2
+
+def multiply(num1, num2):
+    return num1 * num2
+
+def divide(num1, num2):
+    return num1 / num2
+
+print("Please select operation -\n" \
+        "1. Add\n" \
+        "2. Subtract\n" \
+        "3. Multiply\n" \
+        "4. Divide\n")
+
+
+select = int(input("Select operations form 1, 2, 3, 4 :"))
+
+number_1 = int(input("Enter first number: "))
+number_2 = int(input("Enter second number: "))
+
+if select == 1:
+    print(number_1, "+", number_2, "=",
+                    add(number_1, number_2))
+
+elif select == 2:
+    print(number_1, "-", number_2, "=",
+                    subtract(number_1, number_2))
+
+elif select == 3:
+    print(number_1, "*", number_2, "=",
+                    multiply(number_1, number_2))
+
+elif select == 4:
+    print(number_1, "/", number_2, "=",
+                    divide(number_1, number_2))
+else:
+    print("Invalid input")