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Create_Model.py
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Create_Model.py
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from numpy import array
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from pickle import dump
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from keras.utils import to_categorical
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from keras.models import Sequential
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from keras.layers import Dense
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from keras.layers import LSTM
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from keras.callbacks import CSVLogger
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# load doc into memory
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def load_doc(filename):
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# open the file as read only
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file = open(filename, 'r')
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# read all text
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text = file.read()
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# close the file
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file.close()
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return text
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# load
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in_filename = 'char_sequences.txt'
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raw_text = load_doc(in_filename)
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lines = raw_text.split('\n')
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# integer encode sequences of characters
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chars = sorted(list(set(raw_text)))
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mapping = dict((c, i) for i, c in enumerate(chars))
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sequences = list()
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for line in lines:
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# integer encode line
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encoded_seq = [mapping[char] for char in line]
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# store
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sequences.append(encoded_seq)
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# vocabulary size
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vocab_size = len(mapping)
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print('Vocabulary Size: %d' % vocab_size)
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# separate into input and output
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sequences = array(sequences)
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X, y = sequences[:, :-1], sequences[:, -1]
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sequences = [to_categorical(x, num_classes=vocab_size) for x in X]
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X = array(sequences)
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y = to_categorical(y, num_classes=vocab_size)
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# define model
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model = Sequential()
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model.add(LSTM(250, input_shape=(X.shape[1], X.shape[2]), return_sequences=True))
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model.add(LSTM(250, return_sequences=True))
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model.add((LSTM(250)))
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model.add(Dense(vocab_size, activation='softmax'))
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# compile model
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model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
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# print(model.summary())
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# fit model
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csv_logger = CSVLogger('log.csv', append=True, separator=';')
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model.fit(X, y, epochs=30, verbose=2, callbacks=[csv_logger])
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# save the model to file
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model.save('model.h5')
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# save the mapping
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dump(mapping, open('mapping.pkl', 'wb'))
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53
Create_data.py
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Create_data.py
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# load doc into memory
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def load_doc(filename):
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# open the file as read only
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file = open(filename, 'r')
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# read all text
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text = file.read()
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# close the file
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file.close()
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return text
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# save tokens to file, one dialog per line
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def save_doc(lines, filename):
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data = '\n'.join(lines)
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file = open(filename, 'w')
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file.write(data)
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file.close()
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# load text
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raw_text = load_doc('input_data.txt')
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print(raw_text)
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# Clear
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out = ""
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for sim in raw_text:
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if 97 <= ord(sim.lower()) <= 122 or sim.lower() == ' ' or sim.lower() == '\n':
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out = out + sim.lower()
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raw_text = out
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# clean
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tokens = raw_text.split()
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raw_text = ' '.join(tokens)
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# organize into sequences of characters
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length = 10
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sequences = list()
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for i in range(length, len(raw_text)):
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# select sequence of tokens
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seq = raw_text[i - length:i + 1]
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# store
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sequences.append(seq)
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print(sequences)
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print(sequences)
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print('Total Sequences: %d' % len(sequences))
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# save sequences to file
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out_filename = 'char_sequences.txt'
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save_doc(sequences, out_filename)
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38
Generate.py
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Generate.py
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from pickle import load
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from keras.models import load_model
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from keras.utils import to_categorical
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from keras.preprocessing.sequence import pad_sequences
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import keras as K
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# generate a sequence of characters with a language model
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def generate_seq(model, mapping, seq_length, seed_text, n_chars):
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in_text = seed_text
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# generate a fixed number of characters
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for _ in range(n_chars):
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# encode the characters as integers
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encoded = [mapping[char] for char in in_text]
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# truncate sequences to a fixed length
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encoded = pad_sequences([encoded], maxlen=seq_length, truncating='pre')
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# one hot encode
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encoded = to_categorical(encoded, num_classes=len(mapping))
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# predict character
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yhat = model.predict_classes(encoded, verbose=0)
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# reverse map integer to character
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out_char = ''
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for char, index in mapping.items():
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if index == yhat:
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out_char = char
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break
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# append to input
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in_text += char
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return in_text
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# load the model
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model = load_model('model.h5')
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# load the mapping
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mapping = load(open('mapping.pkl', 'rb'))
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print(generate_seq(model, mapping, 10, 'the ', 1000))
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178
README.md
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README.md
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# BC_Matsunych_2020_Final
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# Systémová príručka
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Tento projekt je implementovaný tak, že samostatné skripty nezávisia jeden od druhého a môžu sa používať samostatne. Zdrojové kódy boli implementované v jazyku Python 3.6.10. Keras bol použitý na implementáciu ako hlavná knižnica.
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Zdrojové súbory:
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• Create_data.py
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• Create Model.py
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• Generate.py
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• Create_data_2.py
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• Perplexity.py
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• requirements.txt
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## Create_data.py
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Tento skript prijíma ako vstup súbor „input_data.txt“ obsahujúci textové údaje na trénovanie.
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Po dokončení sa vytvorí súbor „char_sequences.txt“ obsahujúci postupnosti znakov zo vstupného súboru.
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### Procesy
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• Otvorenie a čítanie súboru. To sa vykonáva pomocou funkcie load_doc().
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• Ďalšou fázou je príprava údajov. Počas prípravy sa z údajov odstránia všetky špeciálne znaky okrem medzier. Ďalej všetky ostatné znaky prevedené na malé písmená.
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out = ""
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for sim in raw_text:
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if 97 <= ord(sim.lower()) <= 122 or sim.lower() == ' ' or sim.lower() == '\n':
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out = out + sim.lower()
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raw_text = out
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tokens = raw_text.split()
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raw_text = ' '.join(tokens)
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• Z vyčistených údajov sa vytvoria postupnosti znakov. length - dĺžka sekvencie.
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length = 10
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sequences = list()
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for i in range(length, len(raw_text)):
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# select sequence of tokens
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seq = raw_text[i - length:i + 1]
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# store
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sequences.append(seq)
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• Hotové sekvencie sa uložia do súboru „char_sequences.txt“.
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## Create_Model.py
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V tomto skripte sa vytvorí model a začína sa učenie neurónovej siete. Na vstupe skript dostane sekvenčný súbor „char_sequences.txt“. Na konci práce sa vytvoria dva súbory "model.h5" a "mapping.pkl". Vytvorí sa tiež súbor “log.csv”, v ktorom sa uložia výsledky metrík pre trénovanie.
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### Procesy
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• Otvorenie a čítanie súboru. Vytvorí sa zoznam sekvencií.
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in_filename = 'char_sequences.txt'
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raw_text = load_doc(in_filename)
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lines = raw_text.split('\n')
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• Kódovanie, priradenie celočíselnej hodnoty každému pôvodnému znaku.
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chars = sorted(list(set(raw_text)))
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mapping = dict((c, i) for i, c in enumerate(chars))
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sequences = list()
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for line in lines:
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# integer encode line
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encoded_seq = [mapping[char] for char in line]
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# store
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sequences.append(encoded_seq)
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• One-hot kódovanie.
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sequences = [to_categorical(x, num_classes=vocab_size) for x in X]
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• Tvorba modelu. Implementácia vrstiev, výber aktivačnej funkcie a početu neurónov.
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model = Sequential()
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model.add(LSTM(250, input_shape=(X.shape[1], X.shape[2]), return_sequences=True))
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model.add(LSTM(250, return_sequences=True))
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model.add((LSTM(250)))
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model.add(Dense(vocab_size, activation='softmax'))
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• Zostavenie modelu. Výber chybovej funkcie a optimalizatora.
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model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
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• Trénovanie modelu.
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model.fit(X, y, epochs=30, verbose=2, callbacks=[csv_logger])
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• Mapovanie a model sa uložia.
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model.save('model.h5')
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dump(mapping, open('mapping.pkl', 'wb'))
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## Generate.py
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Tento skript generuje postupnosť znakov. Na vstupe sú dva súbory „model.h5“ a „mapping.pkl“, obsahujú stav vyškolenej natrénovanej siete a mapovanie (kódovanie znakov celočíselnými údajmi). Výstupom tohto skriptu sú vygenerované postupnosti znakov.
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def generate_seq(model, mapping, seq_length, seed_text, n_chars):
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in_text = seed_text
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for _ in range(n_chars):
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encoded = [mapping[char] for char in in_text]
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encoded = pad_sequences([encoded], maxlen=seq_length, truncating='pre')
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encoded = to_categorical(encoded, num_classes=len(mapping))
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yhat = model.predict_classes(encoded, verbose=0)
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out_char = ''
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for char, index in mapping.items():
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if index == yhat:
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out_char = char
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break
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in_text += char
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return in_text
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Tento skript obsahuje hlavnú funkciu „ generate_seq “, v ktorej sa uskutočňujú vyššie opísané procesy na kódovanie znakov a inverzné procesy na dekódovanie znakov. Na generovanie symbolov sa používa funkcia knižnice Keras „model.predict_classes“.
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## Create_data_2.py
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Tento skript sa podobá na Create_data.py s jedným rozdielom, výsledkom budú pravidelné sekvencie, nie n-gramové sekvencie.
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## Perplexity.py
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Účelom tohto skriptu je počítať perplexitu. Na vstupe tohto skriptu sú dva súbory "gen_seq.txt" a "test_seq.txt", obsahujúce sekvencie generované pomocou skriptu Create_data_2.py.
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### Procesy
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• Odovzdanie súboru a jeho One-hot kódovanie.
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def input_tensor(in_filename):
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# in_filename = 'char_sequences_1.txt'
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raw_text = load_doc(in_filename)
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lines = raw_text.split('\n')
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# integer encode sequences of characters
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chars = sorted(list(set(raw_text)))
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mapping = dict((c, i) for i, c in enumerate(chars))
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sequences = list()
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for line in lines:
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# integer encode line
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encoded_seq = [mapping[char] for char in line]
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# store
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sequences.append(encoded_seq)
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vocab_size = len(mapping)
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print('Vocabulary Size: %d' % vocab_size)
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# separate into input and output
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sequences = array(sequences)
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X = sequences[:, :-1]
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sequences = [to_categorical(x, num_classes=vocab_size) for x in X]
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X = array(sequences)
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return X
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• Počítanie perplexity.
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cce = tf.keras.losses.CategoricalCrossentropy(tf.constant([1.]), tf.constant([0.001]))
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a = cce(Y, X).numpy()
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print("Perplexity: ", 2 ** a)
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## requirements.txt
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Tento súbor bol vytvorený pomocou príkazu:
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**> pip freeze > requirements.txt**
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Tento súbor obsahuje všetky nainštalované balíčky pre projekt. To umožňuje inštaláciu všetkých balíkov pomocou príkazu:
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**> pip install -r requirements.txt**
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62
requirements.txt
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62
requirements.txt
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absl-py==0.9.0
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astor==0.8.0
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blinker==1.4
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brotlipy==0.7.0
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cachetools==4.1.0
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certifi==2020.6.20
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cffi==1.14.0
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chardet==3.0.4
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click==7.1.2
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cryptography==2.9.2
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cycler==0.10.0
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gast==0.2.2
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google-auth @ file:///tmp/build/80754af9/google-auth_1594357566944/work
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google-auth-oauthlib==0.4.1
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google-pasta==0.2.0
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grpcio==1.27.2
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h5py==2.10.0
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idna @ file:///tmp/build/80754af9/idna_1593446292537/work
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itsdangerous==1.1.0
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Jinja2==2.11.2
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Keras==2.3.1
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Keras-Applications @ file:///tmp/build/80754af9/keras-applications_1594366238411/work
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Keras-Preprocessing==1.1.0
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kiwisolver==1.2.0
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Markdown==3.1.1
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MarkupSafe==1.1.1
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matplotlib @ file:///C:/ci/matplotlib-base_1592846129657/work
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mkl-fft==1.1.0
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mkl-random==1.1.1
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mkl-service==2.3.0
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numpy==1.18.5
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oauthlib==3.1.0
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opt-einsum==3.1.0
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pandas @ file:///C:/ci/pandas_1592833608684/work
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protobuf==3.12.3
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pyasn1==0.4.8
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pyasn1-modules==0.2.7
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pycparser @ file:///tmp/build/80754af9/pycparser_1594388511720/work
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PyJWT==1.7.1
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pyOpenSSL @ file:///tmp/build/80754af9/pyopenssl_1594392929924/work
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pyparsing==2.4.7
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pyreadline==2.1
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PySocks==1.7.1
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python-dateutil==2.8.1
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pytz==2020.1
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PyYAML==5.3.1
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requests @ file:///tmp/build/80754af9/requests_1592841827918/work
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requests-oauthlib==1.3.0
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rsa==4.0
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scipy @ file:///C:/ci/scipy_1592930618155/work
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six==1.15.0
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tensorboard==2.2.1
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tensorboard-plugin-wit==1.6.0
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tensorflow==2.1.0
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tensorflow-estimator==2.1.0
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termcolor==1.1.0
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tornado==6.0.4
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urllib3==1.25.9
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Werkzeug==0.16.1
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win-inet-pton==1.1.0
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wincertstore==0.2
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wrapt==1.12.1
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