python-function--qualname

1.__qualname__

A dotted name showing the “path” from a module’s global scope to a class, function or method defined in that module, as defined in PEP 3155. For top-level functions and classes, the qualified name is the same as the object’s name:

一个显示从从定义该对象的模块到到达该对象(类，函数，方法)所经路径的带.号的名字？对于top-level的类和方法，该名字就是该对象的名字。

在IDLE上运行的例子：

>>> class C:
    print("hi")
    class D:
        print("D")

        
hi
D
>>> a = C()
>>> print(a.D)
<class '__main__.C.D'>
>>> 

下面的这个例子来自官方www.python.org

>>> class C:
...     class D:
...         def meth(self):
...             pass
...
>>> C.__qualname__
'C'
>>> C.D.__qualname__
'C.D'
>>> C.D.meth.__qualname__
'C.D.meth'