Cipta bot sembang - JO PARIS 4

Dalam artikel ini, saya menunjukkan cara mencipta bot sembang mudah dengan aliran tensor.

Untuk data, saya menggunakan set data kaggle daripada PARIS JO JO 2024 untuk mendapatkan ayat pada peringkat latihan.

Anda boleh mendapatkan kod penamat dalam github saya : https://github.com/victordalet/Kaggle_analysis/tree/feat/paris_2024_olympics

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I - Set data bot sembang lalai

Setset aliran tensor pada bot sembang kelihatan seperti ini.
Kita boleh mencari tag, corak dan pelbagai respons.
Matlamat kami adalah untuk menambah urutan yang berbeza daripada set data pertaruhan JO dan menambahkannya pada fail seperti ini.

{
  "intents": [
    {
      "tag": "google",
      "patterns": [
        "google",
        "search",
        "internet"
      ],
      "responses": [
        "Redirecting to Google..."
      ]
    },

II - Pemprosesan data

Saya membaca set data bot sembang dalam json lalai dan csv JO dan membelah serta memprosesnya untuk menambah ayat dalam json

import json


class CreateDataset:
    def __init__(self):
        self.json_path = 'data.json'
        self.csv_path = '../paris-2024-faq.csv'
        with open(self.json_path) as file:
            self.dataset = json.load(file)
        f = open(self.csv_path, 'r')
        dataset_split = f.read().split(";")
        question = False
        for data in dataset_split:
            if question:
                question = False
                self.dataset["intents"][-1]["responses"].append(data)

            if "?" in data:
                question = True
                self.dataset["intents"].append({
                    "tag": "",
                    "patterns": [
                        data
                    ],
                    "responses": [
                    ]
                })
        with open(self.json_path, 'w') as f:
            json.dump(self.dataset, f)

III - Latihan

Untuk tujuan latihan, saya telah mengedit contoh aliran tensor.
Jika anda mengambil kod saya untuk menjalankannya, tambahkan dalam hujah pertama bilangan zaman yang anda mahukan.
Buat direktori simpan di mana model anda akan pergi, dan tambahkan di dalam fail classes.pkl dan words.pkl yang berada dalam github seperti pada permulaan artikel ini.

import random
import json
import pickle
import numpy as np
import sys

import nltk
from nltk.stem import WordNetLemmatizer

from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import Dense, Dropout
from tensorflow.keras.optimizers import SGD


class Train:
    words: list
    classes: list
    documents: list
    ignore_letters: list
    training: list
    output_empty: list
    train_x: list
    train_y: list
    model: Sequential
    epochs: int

    def __init__(self):
        self.lemmatizer = WordNetLemmatizer()
        self.intents = json.loads(open('data.json').read())
        self.words = []
        self.classes = []
        self.documents = []
        self.training = []
        self.ignore_letters = ['?', '!']
        self.epochs = int(sys.argv[1])

    def run(self):
        self.download_nltk_data()
        self.load_training_data()
        self.prepare_training_data()
        self.build_neural_network()
        self.train()

    @staticmethod
    def download_nltk_data():
        nltk.download('punkt')
        nltk.download('wordnet')

    def load_training_data(self):
        for intent in self.intents['intents']:
            for pattern in intent['patterns']:
                word_list = nltk.word_tokenize(pattern)
                self.words.extend(word_list)
                self.documents.append((word_list, intent['tag']))
                if intent['tag'] not in self.classes:
                    self.classes.append(intent['tag'])

    def prepare_training_data(self):
        self.words = [self.lemmatizer.lemmatize(word)
                      for word in self.words
                      if word not in self.ignore_letters]

        self.words = sorted(set(self.words))
        self.classes = sorted(set(self.classes))
        pickle.dump(self.words, open('saves/words.pkl', 'wb'))
        pickle.dump(self.classes, open('saves/classes.pkl', 'wb'))

        self.output_empty = [0] * len(self.classes)
        for document in self.documents:
            bag = []
            word_patterns = document[0]
            word_patterns = [self.lemmatizer.lemmatize(word.lower())
                             for word in word_patterns]
            for word in self.words:
                bag.append(1) if word in word_patterns else bag.append(0)

            output_row = list(self.output_empty)
            output_row[self.classes.index(document[1])] = 1
            self.training.append([bag, output_row])

        random.shuffle(self.training)
        self.training = np.array(self.training)

        self.train_x = list(self.training[:, 0])
        self.train_y = list(self.training[:, 1])

    def build_neural_network(self):
        self.model = Sequential()
        self.model.add(Dense(128, input_shape=(len(self.train_x[0]),),
                             activation='relu'))
        self.model.add(Dropout(0.5))
        self.model.add(Dense(64, activation='relu'))
        self.model.add(Dropout(0.5))
        self.model.add(Dense(len(self.train_y[0]), activation='softmax'))

        sgd = SGD(lr=0.01, momentum=0.9, nesterov=True)
        self.model.compile(loss='categorical_crossentropy',
                           optimizer=sgd,
                           metrics=['accuracy'])

    def train(self):
        self.model.fit(np.array(self.train_x),
                       np.array(self.train_y),
                       epochs=self.epochs,
                       batch_size=5,
                       verbose=1)
        self.model.save('saves/chatbot_model.model')


if __name__ == "__main__":
    Train().run()

IV - Ujian

Saya mencipta kelas ChatBot, dengan kaedah ujian yang mengambil mesej rawak.
Anda boleh menggunakan kaedah get_response untuk menambahkan chatbot ini pada aplikasi anda, contohnya saya memanggilnya dalam salah satu projek saya dalam api flask untuk mempunyai chatbot saya dalam tapak web.

import random
import json
import pickle
import numpy as np

import nltk
from nltk.stem import WordNetLemmatizer
from tensorflow.keras.models import load_model


class ChatBot:
    lemmatizer: WordNetLemmatizer
    intents: dict
    words: list
    classes: list
    model: load_model
    ERROR_THRESHOLD = 0.25

    def __init__(self):
        self.download_nltk_data()
        self.lemmatizer = WordNetLemmatizer()
        self.intents = json.loads(open('data.json').read())
        self.words = pickle.load(open('saves/words.pkl', 'rb'))
        self.classes = pickle.load(open('saves/classes.pkl', 'rb'))
        self.model = load_model('saves/chatbot_model.model')

    @staticmethod
    def download_nltk_data():
        nltk.download('punkt')
        nltk.download('wordnet')

    def clean_up_sentence(self, sentence):
        sentence_words = nltk.word_tokenize(sentence)
        sentence_words = [self.lemmatizer.lemmatize(word)
                          for word in sentence_words]
        return sentence_words

    def bag_of_words(self, sentence):
        sentence_words = self.clean_up_sentence(sentence)
        bag = [0] * len(self.words)
        for w in sentence_words:
            for i, word in enumerate(self.words):
                if word == w:
                    bag[i] = 1
        return np.array(bag)

    def predict_class(self, sentence):
        bow = self.bag_of_words(sentence)
        res = self.model.predict(np.array([bow]))[0]
        results = [[i, r]
                   for i, r in enumerate(res)
                   if r > self.ERROR_THRESHOLD]
        results.sort(key=lambda x: x[1], reverse=True)
        return_list = []
        for r in results:
            return_list.append({'intent': self.classes[r[0]],
                                'probability': str(r[1])})
        return return_list

    def get_response(self, intents_list):
        intents_json = self.intents
        tag = intents_list[0]['intent']
        list_of_intents = intents_json['intents']
        for i in list_of_intents:
            if i['tag'] == tag:
                result = random.choice(i['responses'])
                break
        return result

    def test(self):
        while True:
            message = input("")
            ints = self.predict_class(message)
            res = self.get_response(ints)
            print(res)

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