<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def conf(self, value):
 """Change of configuration. :param value: new configuration to use. :type value: Category or Configuration """


        self._conf = self._toconf(value)

        if self.autoconf:
            self.applyconfiguration()