Modules, classes, and objects (Python learning notes)

Modules, classes, and objects

1. Dictionary, remember the concept of key-value pairs, remember from key-value pairs

mystuff = {‘apple‘:"I am apples"}print mystuff[‘apple‘]

2. Module

‘‘‘    模块    1.模块是包含函数和变量的文件    2.模块这个文件可以被导入    3.可以使用.操作符访问模块中的函数和变量‘‘‘#模块代码示例#以下是一个模块，名字叫mystuff.py# this goes in mustuff.pydef apple():    print("I am a apple!")  # this is just a variable tangerine = ‘Living reflection of a dream.‘#接下来可以使用import来调用这个模块，并且访问模块中的函数以及变量import mystuffmystuff.apple()print(mystuff.tangerine)#执行上面的代码输出结果如下[[email protected] module]# python module_test.py I am a apple!Living reflection of a dream.‘‘‘    总结以及对比    1.模块好比字典的升级版，类似于键值对风格的容器    2.通过键获取值，对于字典来说，键是一个字符串，获取值的语法是["key"];    3.对于模块来说，键是函数或者变量的名称，通过.key语法来获取值。    4.以上，并没有其他的区别‘‘‘

3. Classes and objects
Class is also a container, we can put functions and data into this container, and through the "." Operators to access them.

class Mystuff(object):    """docstring for Mystuff"""    def __init__(self):        #添加属性，初始化对象        self.tangerine = "for the win"    def apple(self):        print("I am classy apples!")#创建对象---类的实例化(instantiate)thing = Mystuff()thing.apple()print(thing.tangerine)#执行代码的输出结果[[email protected] class]# python mystuff.py I am classy apples!for the win

Modules, classes, and objects (Python learning notes)