019Classes.py

how_many_s = [{'s': False}, "sassafrass", 18, ["a", "c", "s", "d", "s"]]

for element in how_many_s:
  if hasattr(element, "count"):
    print(element.count("s"))
    
# # # # # # # # #
    
class Circle:
  pi = 3.14
  def __init__(self, diameter):
    print("Creating circle with diameter {d}".format(d=diameter))
    # Add assignment for self.radius here:
    self.radius = diameter/2
  def circumference(self):
    return 2 * self.pi * self.radius
  
medium_pizza = Circle(12)
teaching_table = Circle(36)
round_room = Circle(11460)

print(medium_pizza.circumference())
print(teaching_table.circumference())
print(round_room.circumference())

### dir() method on objects
print(dir(5))

def this_function_is_an_object():
  pass

print(dir(this_function_is_an_object))

### __repr__(self) method takes no parameter and return only string

class Circle:
  pi = 3.14
  
  def __init__(self, diameter):
    self.radius = diameter / 2
  
  def area(self):
    return self.pi * self.radius ** 2
  
  def circumference(self):
    return self.pi * 2 * self.radius

  def __repr__(self):
    return "Circle with radius {radius}".format(radius=self.radius)
  
  
medium_pizza = Circle(12)
teaching_table = Circle(36)
round_room = Circle(11460)

print(medium_pizza)
print(teaching_table)
print(round_room)