added perimeter.py file

app.py

-try:
-    x =10
-    y =10
-    print(x)
-    print(x+y)
-except NameError:
-    print("not defined")
-except:
-    X =10
-    Y=10
-    print("an exception error", X+Y)
-finally:
-    print("no errors")
\ No newline at end of file
+print("Calculate perimeter and area of the following shapes given in the list")
+print("\n1) Rectangle\n2) Square\n3) Circle\n")
+
+option = input("Type ''pr'' to calculate the perimeter of rectangle and ''ar'' to calculate the area of the rectangle\n"
+               "Type ''ps'' to calculate the perimeter of square and ''as'' to calculate the area of the"
+               "square\nType ''pc'' to calculate the perimeter of circle and ''ac'' to calculate the area of the circle "
+               ">> ")
+
+if option == "pr":
+    print("\nDo you want to calculate the perimeter of Rectangle? ")
+    confirm = (input("type ''y'' to continue and ''n'' to stop >> "))
+    if confirm == "y":
+        length = int(input("\nenter the length of the rectangle >> "))
+        breadth = int(input("enter the breadth of the rectangle >> "))
+        radius = int(input("enter the radius of the rectangle >> "))
+    elif confirm == "n":
+        print("try again")
+
+

scripts/constants/constant.py

+# pi value
+PI = 3.14

scripts/core/handlers/perimeter.py

+from scripts.constants.constant import PI
+from app import length, breadth, radius
+
+
+class Perimeter:
+    def __init__(self, length1, breadth1, radius1):
+        self.length1 = length1
+        self.breadth1 = breadth1
+        self.radius1 = radius1
+    def rectangle(Perimeter):
+        final_perimeter = 2 * (Perimeter.length1 + Perimeter.breadth1)
+        print("Perimeter of the Rectangle >> ", final_perimeter)
+
+
+peri_of_circle = Perimeter(length, breadth, radius)
+peri_of_circle.rectangle()