Implemented changes for exercice 1

circle.py

@@ -0,0 +1,9 @@
+#create circle class
+import numpy as np
+class Circle:
+    def __init__(self, radius):
+        self.radius = radius
+    def area(self):
+        return  np.pi * self.radius ** 2
+    def perimeter(self):
+        return 2 * np.pi * self.radius

flask_app.py

@@ -2,6 +2,8 @@
 
 from helper import perform_calculation, convert_to_float
 
+from circle import Circle
+
 app = Flask(__name__)  # create the instance of the flask class
 
 
@@ -10,6 +12,24 @@
 def home():
     return render_template('home.html')
 
+@app.route('/circle', methods=['GET', 'POST'])
+def circle():
+    if request.method == 'POST':
+        radius = request.form['radius']
+
+        try:
+            radius = convert_to_float(radius)
+            if radius <= 0:
+                return render_template('circle.html', printed_result = "Must be a positive Number.")
+
+            circle = Circle(radius=radius)
+            area = circle.area()
+            perimeter = circle.perimeter()
+            return render_template('circle.html', printed_result = f'The area of you circle is {str(area)} and the perimeter is {str(perimeter)}')
+        except ValueError:
+            return render_template('circle.html', printed_result = "Invalid input!")
+
+    return render_template('circle.html')
 
 @app.route('/calculate', methods=['GET', 'POST'])  # associating the GET and POST method with this route
 def calculate():

templates/circle.html

@@ -0,0 +1,12 @@
+{% extends 'layout.html' %}
+{% block content %}
+	<h1>Circle area and perimeter calculations</h1>
+    <form method="post">
+        <input type="text" name="radius" placeholder="Enter the radius of the circle here" required="required" />
+        <button type="submit">Calculate</button>
+    </form>
+   <br>
+
+   {{ printed_result }}
+
+{% endblock %}

templates/layout.html

@@ -12,6 +12,7 @@ <h1 class="logo"><a href="{{ url_for('home') }}">Home</a></h1>
         <strong><nav>
           <ul class="menu">
             <li><a href="{{ url_for('calculate') }}">General Calculator</a></li>
+            <li><a href="{{ url_for('circle') }}">Circle Calculator</a></li>
           </ul>
         </nav></strong>
       </div>

test_circle.py

@@ -0,0 +1,12 @@
+import numpy as np
+from circle import Circle 
+
+def test_perimeter():
+    circle = Circle(1)
+    expected_result = 2 * np.pi * 1
+    assert circle.perimeter() == expected_result
+
+def test_area():
+    circle = Circle(1)
+    expected_result = np.pi * 1 ** 2
+    assert circle.area() == expected_result