Please tell me about overrides.The following example describes a method with the same name as the inherited method.
When should I describe the override?Also, what are the advantages of that?I can learn grammar, but please tell me the meaning of using override.You can see that derivative class methods work.
◆Example sentence◆
class Book:
def__init__(self, title, price):
self.title=title
self.price=price
def printPrice (self, num):
print(self.title+':', num, 'in books', self.price*num, 'yen')
Class ColorBook (Book):
color='yellow'
def printPrice (self, num):
print(self.title+':', num, 'in books', self.price*num, 'yen')
print(self.color)
book2=ColorBook ('Picture Book', 1380')
book2.printPrice(2)
●Run Results●
Picture book: 2,760 yen for 2 books
Yellow
Environment: Windows 10
python
The big benefit is
·Reduce the amount of code
Although it is difficult to realize the meaning of a class with only a single simple method, as shown in the example, it is used to "just a little" change the functionality of an existing class.As this is a method-by-method change, you must design and separate the elements that you want to change later.
If you start thinking about "more efficient design" instead of grammar, you will realize its usefulness.On the other hand, common processing is concentrated in the base class, making it difficult to deal with problems on the base class side, and because of the reaction, draft design is important.
When you're done learning grammar, learning "object orientation and design patterns" will expand the world.
For example, using C#, Java, C++, or other languages that itself is intended to be object oriented, you can feel this benefit when calling out language features in the first place, but Python may find it difficult to "get the vibe while using it."
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