Python中的静态变量继承 [英] Static variable inheritance in Python

问题描述

我正在为Blender编写一个项目的Python脚本，但我对这门语言很陌生。我困惑的是静态变量的使用。以下是我目前正在处理的代码：

I'm writing Python scripts for Blender for a project, but I'm pretty new to the language. Something I am confused about is the usage of static variables. Here is the piece of code I am currently working on:

class panelToggle(bpy.types.Operator):
    active = False

    def invoke(self, context, event):
        self.active = not self.active
        return{'FINISHED'}

class OBJECT_OT_openConstraintPanel(panelToggle):
    bl_label = "openConstraintPanel"
    bl_idname = "openConstraintPanel"

这个想法是第二个类应该从第一个继承 active 变量和 invoke 方法，这样调用OBJECT_OT_openConstraintPanel.invoke（）就会改变OBJECT_OT_openConstraintPanel.active 。但是，如上所述，使用 self 不会起作用，也不会使用 panelToggle 。我知道怎么做这个吗？

The idea is that the second class should inherit the active variable and the invoke method from the first, so that calling OBJECT_OT_openConstraintPanel.invoke() changes OBJECT_OT_openConstraintPanel.active. Using self as I did above won't work however, and neither does using panelToggle instead. Any idea of how I go about this?

推荐答案

使用输入（个体经营）用于访问类属性

>>> class A(object):
 var  = 2
 def write(self):
  print type(self).var
>>> class B(A):
 pass
>>> B().write()
2
>>> B.var = 3
>>> B().write()
3
>>> A().write()
2

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