RuntimeError: input must have 3 dimensions, got 2

[xiang526]

when I run the code of dense modul, a error arise: RuntimeError: input must have 3 dimensions, got 2

File "F:\jupyter project\菜鸟的自我拯救\20Urban Traffic Prediction36\Dense module\training.py", line 203, in
y_time = evaluate_temp_att(temporal_encoder, temporal_decoder, x_time, opt.n_out_sp, device)

File "F:\jupyter project\菜鸟的自我拯救\20Urban Traffic Prediction36\Dense module\utils.py", line 201, in evaluate_temp_att
encoder_output, h = encoder(batch,h)

File "E:\anconda\lib\site-packages\torch\nn\modules\module.py", line 722, in _call_impl
result = self.forward(*input, **kwargs)

File "../Temporal module\bahdanau_att.py", line 48, in forward
output, hidden = self.lstm(inputs, hidden)

File "E:\anconda\lib\site-packages\torch\nn\modules\module.py", line 722, in _call_impl
result = self.forward(*input, **kwargs)

File "E:\anconda\lib\site-packages\torch\nn\modules\rnn.py", line 574, in forward
self.check_forward_args(input, hx, batch_sizes)

File "E:\anconda\lib\site-packages\torch\nn\modules\rnn.py", line 525, in check_forward_args
self.check_input(input, batch_sizes)

File "E:\anconda\lib\site-packages\torch\nn\modules\rnn.py", line 175, in check_input
expected_input_dim, input.dim()))

RuntimeError: input must have 3 dimensions, got 2