input: Write a python function to create a Circle class with methods to calculate area and circumference.
  assert Circle(1).area() == 3.14
  assert Circle(1).circumference() == 6.28
  assert Circle(5).area() == 78.5
  assert Circle(5).circumference() == 31.400000000000002
output: def Circle(radius):
      class Circle:
          def __init__(self, radius):
              self.radius = radius
  
          def area(self):
              return 3.14 * self.radius * self.radius
  
          def circumference(self):
              return 2 * 3.14 * self.radius
  
      return Circle(radius)