TypeError: __init__() takes at least 2 arguments (1 given)

[michelecafagna26]

Sorry if a try to execute cornell_char_seq2seq_predict.py from console, I get this error from line 34:
Traceback (most recent call last):
File "cornell_char_seq2seq_predict.py", line 98, in
main()
File "cornell_char_seq2seq_predict.py", line 94, in main
model = CornellCharChatBot()
File "cornell_char_seq2seq_predict.py", line 34, in init
encoder = LSTM(units=HIDDEN_UNITS, return_state=True, name="encoder_lstm")
TypeError: init() takes at least 2 arguments (1 given)

keras-chatbot-web-api/chatbot_web/cornell_char_seq2seq_predict.py

Line 34 in 4ff4769

encoder = LSTM(units=HIDDEN_UNITS, return_state=True, name="encoder_lstm")