parameters: (self, data_batch)
docstring: A convenient function that calls both ``forward`` and ``backward``.
docstring_summary: A convenient function that calls both ``forward`` and ``backward``.
docstring_tokens: A convenient function that calls both forward and backward .
function: def forward_backward(self, data_batch):
          """A convenient function that calls both ``forward`` and ``backward``."""
          self.forward(data_batch, is_train=True)
          self.backward()
function_tokens: def forward_backward ( self , data_batch ) : self . forward ( data_batch , is_train = True ) self . backward ( )