<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_default_org(self, name):
 """ set the default org for tasks by name key """

        org = self.get_org(name)
        self.unset_default_org()
        org.config["default"] = True
        self.set_org(org)