(solved)There are two questions, the second I have done but the first why it can't call area. Any advices ?

Question

class Shape:
def __init__(self, w, h):
self.width = w
self.height = h

def area(self):
return self.width*self.height

#your code goes here
def __add(self,other):
self.width = self.width+other.width
self.height = self.height+other.height
return Shape(self.width, self.height)
def __gt__(self,other):
area1 = self.width*self.height
area2 = other.width*other.height
return area1 > area2

w1 = int(input())
h1 = int(input())
w2 = int(input())
h2 = int(input())

s1 = Shape(w1, h1)
s2 = Shape(w2, h2)
result = s1 + s2

print(result.area())
print(s1 > s2)

Answer 1

because if you do shape1 + shape2, you doesn't expect to have result stored inside shape1...

if you want so, you do shape1 = shape1 + shape2

Answer 2

# magic method __add__ take leading AND trailing double dunder

# when you add width, and then height, I think you do not modify original (self) width and height

def __add__(self,other):
width = self.width+other.width
height = self.height+other.height
return Shape(width, height)

Answer 3

Why self must be removed ?

Answer 4

Ohhh, I see, I know my mistake. Thank you visph

Answer 5

Okay, I know why I have to name not as same as in init, because it will change the originals. Btw, thanks for million, finally I got the meaning 😂