oop/magic_methods.py - main - eb/python_learn

oop/magic_methods.py

29 строк581 B

EvgeniyBudaev

Магические методы

17 фев 2021, 05:23

17 фев 2021, 05:23b4e39e2

class Point():
  def __init__(self, x, y):
    self.x = x
    self.y = y

  def __str__(self):
    return f'Point x={self.x}, y={self.y}'


p = Point(3,4)
print(p) # <__main__.Point object at 0x7ffad8214e20> без def __str__
print(p) # Point x=3, y=4

# ===
class Road():
  def __init__(self, lenght):
    self.lenght = lenght

  def __len__(self):
    return self.lenght

  def __str__(self):
    return f'A road of lenght: {self.lenght}' 

  def __del__(self):
    print(f'The road has been destroyed')

r = Road(100)
print(len(r)) # 100 \n The road has been destroyed