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abregman 2022-05-01 11:39:02 +03:00
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@ -2856,70 +2856,6 @@ The introduction of virtual machines allowed companies to deploy multiple busine
<details> <details>
<summary>Explain inheritance and how to use it in Python</summary><br><b> <summary>Explain inheritance and how to use it in Python</summary><br><b>
```
By definition inheritance is the mechanism where an object acts as a base of another object, retaining all its
properties.
So if Class B inherits from Class A, every characteristics from class A will be also available in class B.
Class A would be the 'Base class' and B class would be the 'derived class'.
This comes handy when you have several classes that share the same functionalities.
The basic syntax is:
class Base: pass
class Derived(Base): pass
A more forged example:
class Animal:
def __init__(self):
print("and I'm alive!")
def eat(self, food):
print("ñom ñom ñom", food)
class Human(Animal):
def __init__(self, name):
print('My name is ', name)
super().__init__()
def write_poem(self):
print('Foo bar bar foo foo bar!')
class Dog(Animal):
def __init__(self, name):
print('My name is', name)
super().__init__()
def bark(self):
print('woof woof')
michael = Human('Michael')
michael.eat('Spam')
michael.write_poem()
bruno = Dog('Bruno')
bruno.eat('bone')
bruno.bark()
>>> My name is Michael
>>> and I'm alive!
>>> ñom ñom ñom Spam
>>> Foo bar bar foo foo bar!
>>> My name is Bruno
>>> and I'm alive!
>>> ñom ñom ñom bone
>>> woof woof
Calling super() calls the Base method, thus, calling super().__init__() we called the Animal __init__.
There is a more advanced python feature called MetaClasses that aid the programmer to directly control class creation.
```
</b></details>
<details> <details>
<summary>Explain and demonstrate class attributes & instance attributes</summary><br><b> <summary>Explain and demonstrate class attributes & instance attributes</summary><br><b>