The first week I study the basics of classes and objects. First of all is Object-oriented programming. It is not only the data type of a data structure, but also the types of functions that can be applied to the data structure. Second I learn how to define a new class as follow:
class Point:
""" Point class represents and manipulates x,y coords. """
def __init__(self):
""" Create a new point at the origin """
self.x = 0
self.y = 0
Third I know what are build-in objects:
>>>w1 = "word"
>>>w2 = "swords"[1: ]
>>>w1 is w2
False
>>>import turtle
>>> t = turtle.Turtle()
>>>t.pos()
(0.00, 0.00)
Also I learn how to add other methods to class. A method behaves like a function but it is invoked on a specific instance.
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class Point:
""" Create a new Point, at coordinates x, y """
def __init__(self, x=0, y=0):
""" Create a new point at x, y """
self.x = x
self.y = y
def distance_from_origin(self):
""" Compute my distance from the origin """
return ((self.x ** 2) + (self.y ** 2)) ** 0.5
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