human
I am working on the file "Python-5 Class and object.ipynb".
The first task is:
Special method of class

__init__(self, ...)
__lt__
__repr__
__add__
...
Can you write Python program for it?
assistant
#Here is the Python program you requested.

#!/usr/bin/python3
# -*- coding: utf-8 -*-

class rectangle():
    def __init__(self, size_x, size_y):
        self.size_x = size_x
        self.size_y = size_y
        self.area = size_x * size_y

    def __lt__(self, other):
        return self.area < other.area

    def __repr__(self):
        return ('Rectangle('+str(self.size_x)+'x'+str(self.size_y)+')')

sq1 = rectangle(1,11)
sq2 = rectangle(3,4)
sq3 = rectangle(2,5)

x = [sq1, sq2, sq3]
x.sort()
print(x)