def __getattribute__(self, key):
"""
Overridden to lazy instantiate subtask when requested
"""
if key == 'subtask':
if not self.__dict__['subtask']:
subtask = self.__subtask_class(*self.__subtask_args, \
**self.__subtask_kwargs)
self.subtask = subtask
return self.__dict__['subtask']
return Task.__getattribute__(self, key)
