
class Rectangle: def __init__(self, width, height): self.width = width self.height = height def area(self): return self.width * self.height def perimeter(self): return 2 * (self.width + self.height) def __str__(self): return 'Rectangle (width={0}, height={1})'.format(self.width, self.height) def __repr__(self): return 'Rectangle({0}, {1})'.format(self.width, self.height)
r1 = Rectangle(10, 20)
print(r1) # uses __str__
Rectangle (width=10, height=20)
r1 # uses __repr__
Rectangle(10, 20)