Must have to import these dependencies that are following: import joblib import numpy as np import pandas as pd from keras.layers import LSTM from keras import preprocessing import matplotlib.pyplot as plt import sklearn.preprocessing as pre from keras.utils import pad_sequences from keras.layers import Flatten, Dense from tensorflow.keras.models import load_model from keras.preprocessing.text import Tokenizer from tensorflow.keras.callbacks import EarlyStopping from keras.layers import Embedding, Bidirectional, Dropout