Class¶

类定义¶

class Presenter():
    def __init__(self, name):
        # Constructor
        self.name = name
    def say_hello(self):
        # method
        print('Hello, ' + self.name)

实例化¶

presenter = Presenter('Chris')

更改字段的值¶

presenter.name = 'Christopher'

调用对象的方法¶

presenter.say_hello()

访问权限¶

EVERYTHING is public.

_ (single underscore) means avoid unless you really know what you're doing.

__ (double underscore) means do not use.

实践示例¶

class Presenter():
    def __init__(self, name):
        # Constructor
        self.name = name

    @property
    def name(self):
        print('In the getter')
        return self.__name

    @name.setter
    def name(self, value):
        print('In setter')
        # cool validation here
        self.__name = value

presenter = Presenter('Chris')
presenter.name = 'Christopher'
print(presenter.name)

# 输出如下
# In setter
# In setter
# In the getter
# Christopher