Breadth-First and depth-first in Python

Python is divided into classic and modern classes:

Classic class:

Class A ():

Pass

New class:

Class A (object):

Pass

So the difference between a classic class and a new class is that when declaring a class, the new class needs to be prefixed with the object keyword.

The difference between classic and modern classes in Python:

The difference is mainly embodied in inheritance:

Python classes can inherit multiple classes, and Java and C # can inherit only one class

If a Python class inherits more than one class, there are two ways to find the method

When a class is a classic class, multiple inheritance cases are searched in the depth-first way

When a class is a new class, in multiple inheritance cases, the breadth-first method is found

The simple point is: The Classic class is a portrait search, the new class is landscape search

1 Classic class:2 classLife ():3     defdaily (self):4         Print "Multiply"5 6 classAnimal (Life):7     defdaily (self):8         Print "Eat"9         Print "Drink"Ten         Print "Pull" One         Print "Isaac" A  - classPuru (Life): -     def __init__(self): the         Pass -  - classCat (puru,animal): -     def __init__(self): +         Print "Meow Meow" -  +A =Cat () A a.daily () at  -  - the execution results are: -  - Meow Meow - Multiply in  - New class: to classLife (object): +     defdaily (self): -         Print "Multiply" the  * classAnimal (Life): $     defdaily (self):Panax Notoginseng         Print "Eat" -         Print "Drink" the         Print "Pull" +         Print "Isaac" A  the classPuru (Life): +     def __init__(self): -         Pass $  $ classCat (puru,animal): -     def __init__(self): -         Print "Meow Meow" the  -A =Cat ()Wuyi a.daily () the  - the execution results are: Wu  - Meow Meow About Eat $ Drink - Pull -Sub

Breadth-First and depth-first in Python