human
What is a the Python code you requested given the following:
I am working on the file "1_Basics.ipynb".
The first task is:
4- Classes [*]
Classes are at the core of object-oriented programming, they are used to represent an object with related attribues (variables) and methods (functions). 
They are defined as functions but with the keyword class class my_class(object): followed by an indentation. The definition of a class usually contains some methods:
* The first argument of a method must be self in auto-reference.
* Some method names have a specific meaning: 
   * __init__: method executed at the creation of the object
   * __str__ : method executed to represent the object as a string for instance when the object is passed ot the function print
Can you write Python code for it?
assistant
#Here is the Python code you requested.

class Point(object):
    """
    Class of a point in the 2D plane.
    """
    def __init__(self, x=0.0, y=0.0):
        """
        Creation of a new point at position (x, y).
        """
        self.x = x
        self.y = y
        
    def translate(self, dx, dy):
        """
        Translate the point by (dx , dy).
        """
        self.x += dx
        self.y += dy
        
    def __str__(self):
        return("Point: ({:.2f}, {:.2f})".format(self.x, self.y))

p1 = Point()
print(p1)

p1.translate(3,2)
print(p1)

p2 = Point(1.2,3)
print(p2)