If coding tutorials with math examples are the bane of your existence, keep reading. This series uses relatable examples like dogs and cats.
Classes and Methods
# syntax
class ClassName:
pass # remember, pass just means there is not code here yet
Creating a Class
A class is basically a template for an object. Let's create a class (template) for dog.
class Dog: # the name of our template/class
def __init__ (self, name, color): # initialize attributes
self.name = name
self.color = color
Creating an Object
Having a template/class for Dog is great, but it's useless if we don't actually use it. Let's create a dog object.
d = Dog('Cheeto', 'tan')
print(d.name)
Cheeto
Class Constructor
Constructors are each of the attributes of the class. In this case, we already have name and color. You could also add age and many other things.
class Dog: # the name of our template/class
def __init__ (self, name, color, age): # initialize attributes
self.name = name
self.color = color
self.age = age
Object Methods
Objects can have methods. Think of objects as nounds and methods as actions or verbs.
class Dog: # the name of our template/class
def __init__ (self, name, color, age): # initialize attributes
self.name = name
self.color = color
self.age = age
def dog_info(self):
return f'{self.name} is {self.age}.'
d = Dog('Cheeto','tan and black','5')
print(d.dog_info())
Cheeto is 5.
Object Default Methods
Sometimes, you may want to have default values. The default values will fill in all the info, but can also be overridden.
class Dog: # the name of our template/class
def __init__ (self, name = "Cheeto", color = "tan and black", age = "5"): # initialize attributes
self.name = name
self.color = color
self.age = age
def dog_info(self):
return f'{self.name} is {self.age} and {self.color}.'
d1 = Dog()
print(d1.dog_info())
d2 = Dog('Wiley','brown, black, and white','age unknown')
print(d2.dog_info())
Cheeto is 5 and tan and black.
Wiley is age unknown and brown, black, and white.
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