替代class会员权限的功能是什么？

Question

比如我们有一个class:

class A:
    def __init__(self, a):
        self.a = a

要替换的函数调用是什么：

A.a

我想用 map 函数来应用它。

Answer 1

你的问题不是很清楚，但是如果你想改变python中A.a的值，很简单

A.a = "New Value"

根据我从 python documentation 中读到的内容，您似乎可以像其他语言一样不需要 setter() 和 getter() 函数就可以做到这一点。我从上面的 link hyperlinked 中获取了这个例子。

class Employee:
    pass

john = Employee() # Create an empty employee record

# Fill the fields of the record
john.name = 'John Doe'
john.dept = 'computer lab'
john.salary = 1000

Answer 2

class.attribute 的功能等同于使用 getattr(class, 'attribute'):

>>> class A:
...     def __init__(self, a):
...         self.a = a
...
>>> obj = A(1)
>>> obj.a
1
>>> getattr(obj, 'a')
1
>>>

来自documentation:

getattr(object, name[, default])

Return the value of the named attribute of object. name must be a string. If the string is the name of one of the object’s attributes, the result is the value of that attribute. For example, getattr(x, 'foobar') is equivalent to x.foobar. If the named attribute does not exist, default is returned if provided, otherwise AttributeError is raised.

替代class会员权限的功能是什么？

What is the function substituting class member access?

python

attributes

class