def count(self, item):
if self._data is None:
raise InterfaceError("Trying to access data, when there's no data")
return self._data.count(item)
def index(self, *args):
if self._data is None:
raise InterfaceError("Trying to access data, when there's no data")
return self._data.index(*args)
def __reversed__(self):
if self._data is None:
raise InterfaceError("Trying to access data, when there's no data")
return reversed(self._data)
def __iter__(self):
if self._data is None:
raise InterfaceError("Trying to access data, when there's no data")
return iter(self._data)
def __contains__(self, item):
if self._data is None:
raise InterfaceError("Trying to access data, when there's no data")
return item in self._data
def __getitem__(self, idx):
if self._data is None:
raise InterfaceError("Trying to access data, when there's no data")
return self._data.__getitem__(idx)