AttributeError when calling method

Question

I have a class Conf:

class Conf(object):
 def __init__(self):
 pass
 def __setattr__(self,name,value):
 current_container().__set_conf(name,value)

The current_container() returns an instance of the interface class:

class interface(Container):
 def __init__(self,name):
 pass
 def __set_conf(self,name,value):
 ...
 super(interface,self).__set_conf(name,value)

after calling conf.ip=... the exception is arised:

AttributeError: 'interface' object has no attribute '_Conf__set_conf'

It seems that python adding prefix "_Conf" to a method name. How to avoid this?

Answer 1

You're being victim of name mangling, designed mainly to avoid accidents. If you want to specify that _set_conf method should be private, with only one underscore is sufficiently communicative.

Private Variables and Class-local References provides more information about the utility of this feature.