human
I am working on the file "Classes.ipynb".
The first task is:
The addition operator + returns a new instance. 
Next we will write a method that instead of returning a new instance, changes the current instance:
Can you write Python code for it?
 What is a the Python code you requested?
assistant
#Here is the Python code you requested.

class Point():
    """Holds on a point (x,y) in the plane"""
    def __init__(self, x=0, y=0):
        assert isinstance(x, (int, float)) and isinstance(y, (int, float))
        self.x = float(x)
        self.y = float(y)
    def __repr__(self):
        return "Point(" + str(self.x) + ", " + str(self.y) + ")"
    def __eq__(self, other):
        return (self.x, self.y) == (other.x, other.y)
    def __gt__(self, other):
        return (self.x > other.x and self.y > other.y)
    def __add__(self, other):
        assert isinstance(other, (int, Point))
        if isinstance(other, Point):
            return Point(self.x + other.x , self.y + other.y)
        else: # other is int, taken as (int, int)
            return Point(self.x + other , self.y + other)
    
    def increment(self, other): 
        '''this method changes self (add "inplace")'''
        assert isinstance(other,Point)
        self.x += other.x
        self.y += other.y

p = Point(6.5, 7)
p + Point(1,2)
print(p)
p.increment(Point(1,2))
print(p)

Point(5,6) > Point(1,2)