declare class python
# To create a simple class:
class Shape:
def __init__():
print("A new shape has been created!")
pass
def get_area(self):
pass
# To create a class that uses inheritance and polymorphism
# from another class:
class Rectangle(Shape):
def __init__(self, height, width): # The constructor
super.__init__()
self.height = height
self.width = width
def get_area(self):
return self.height * self.widthpython class
class Dog:
def bark(self):
print("Woof!")
def roll(self):
print("*rolling*")
def greet(self):
print("Greetings, master")
def speak(self):
print("I cannot!")
# Creating the Dog class instance and saving it to the variable <clyde>
clyde = Dog()
clyde.bark() # --> Woof!
clyde.roll() # --> *rolling*
clyde.greet() # --> Greetings, master
clyde.speak() # --> I cannot!
# Creating another Dog instance
jenkins = Dog()
jenkins.bark() # --> Woof!
jenkins.roll() # --> *rolling*
# .. And other methods
# .. Infinite objects can be created this way, all implementing the same methods defined in our classclass in python
class LuckyLemur():
def __init__(self, description):
self.description = description
def reveal_description(self):
print(f'Lucky Lemur is {self.description}')
lucky_lemur = LuckyLemur('Pro')
lucky_lemur.reveal_description()class python
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
p1 = Person("John", 36)
p1.age = 40
print(p1.age)
---------------------------------------------------------------
40what is a class in python
Classes are blueprint used to construct objectsclasses in python
# Python classes
class Person():
# Class object attributes (attributes that not needed to be mentioned when creating new class of person)
alive = True
def __init__(self, name, age):
# In the __init__ method you can make attributes that will be mentioned when creating new class of person
self.name = name
self.age = age
def speak(self):
# In every method in class there will be self, and then other things (name, age, etc.)
print(f'Hello, my name is {self.name} and my age is {self.age}') # f'' is type of strings that let you use variable within the string
person_one = Person('Sam', 23) # Sam is the name attribute, and 23 is the age attribute
person_one.speak() # Prints Hello, my name is Sam and my age is 23
==================================================================
# Output:
>>> 'Hello, my name is Sam and my age is 23'Copyright © 2021 Codeinu
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