Python:公共(public)方法调用它们的 'brother' 私有(private)方法

Question

我编写 Python 代码才几周时间，所以我仍在弄清楚这片土地的布局。但是假设我有一个方法可能会被“用户”偶尔调用并且在内部大量使用(即，参数在调用之前已经过检查)。这是我目前正在做的事情:

#The method the 'user' should call:
def do_something(self, arg1, arg2, arg3):
    #write code to do error checking on arg1, agr2, arg3
    #raise exceptions, return codes, etc: depends on whether you are an explicit lover
    #or an implicit lover, it seems. :-)
    ... error checking code here...
    #Now call the 'brother' method that does the real work.
    return self._do_something(self, arg1, arg2, arg3, arg3)

#The method other private methods should call with already validated parameters
def _do_something(self, arg1, arg2, arg3, arg3):
    #don't do error checking on the parameters. get to work...
    ... do what you do...
    return whatever you're supposed to return

这对我来说似乎合乎逻辑。是否有更好的类似 Python 的方法来执行此操作？

保罗

Answer 1

没关系。但是，您的代码中对“兄弟”方法的调用是错误的。你应该这样做:

# Now call the 'brother' method that does the real work.
return self._do_something(arg1, arg2, arg3, arg3)

也就是说，您应该“通过”自引用来调用它，因为它是一个对象方法而不是全局函数。