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Create app.py
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app.py
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| 1 |
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import pandas as pd
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| 2 |
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import streamlit as st
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from langchain.docstore.document import Document
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from langchain_huggingface import HuggingFaceEmbeddings
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from langchain_community.vectorstores import FAISS
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from langchain.chains import RetrievalQA
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from langchain.prompts import PromptTemplate
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from langchain_community.llms import HuggingFaceHub
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import os
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from huggingface_hub import HfApi
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# Configuration Streamlit
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st.set_page_config(page_title="Assistant Support Client", page_icon="🤖", layout="wide")
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# Récupération du token depuis les secrets de l'espace
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HUGGINGFACE_API_TOKEN = st.secrets["HUGGINGFACE_API_TOKEN"]
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# Création du dossier data s'il n'existe pas
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DATA_DIR = "data"
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os.makedirs(DATA_DIR, exist_ok=True)
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EMBEDDINGS_FILE = os.path.join(DATA_DIR, "faq_embeddings.pkl")
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# Configuration du client HF Hub
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hf_api = HfApi(token=HUGGINGFACE_API_TOKEN)
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@st.cache_resource
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def load_faq_data():
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"""Charge les données FAQ depuis un CSV"""
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try:
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df = pd.read_csv('data/customer_support_faq.csv')
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documents = []
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for _, row in df.iterrows():
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question = row['question']
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answer = row['answer']
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documents.append(Document(page_content=f"Q: {question} A: {answer}"))
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return documents
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except Exception as e:
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st.error(f"Erreur lors du chargement des données FAQ: {str(e)}")
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return []
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@st.cache_resource
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def initialize_embeddings(_documents):
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"""Initialise ou charge les embeddings"""
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try:
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embeddings = HuggingFaceEmbeddings(
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model_name="sentence-transformers/paraphrase-multilingual-MiniLM-L12-v2"
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)
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vector_store = FAISS.from_documents(_documents, embeddings)
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return vector_store
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except Exception as e:
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st.error(f"Erreur lors de l'initialisation des embeddings: {str(e)}")
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return None
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@st.cache_resource
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def initialize_qa_chain(vector_store):
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"""Initialise la chaîne de question-réponse"""
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try:
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# Initialisation du modèle
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llm = HuggingFaceHub(
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repo_id="bigscience/bloom", # Vous pouvez changer le modèle
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huggingfacehub_api_token=HUGGINGFACE_API_TOKEN,
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model_kwargs={"temperature": 0.5, "max_length": 512}
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)
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# Template de prompt
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prompt_template = """Utilise le contexte suivant pour répondre à la question.
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Si la réponse n'est pas dans le contexte, réponds "Je ne sais pas."
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Contexte: {context}
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Question: {question}
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Réponse:"""
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PROMPT = PromptTemplate(
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template=prompt_template,
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input_variables=["context", "question"]
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)
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# Création de la chaîne QA
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qa_chain = RetrievalQA.from_chain_type(
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llm=llm,
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chain_type="stuff",
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retriever=vector_store.as_retriever(),
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chain_type_kwargs={"prompt": PROMPT},
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return_source_documents=False,
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)
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return qa_chain
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except Exception as e:
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st.error(f"Erreur lors de l'initialisation de la chaîne QA: {str(e)}")
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return None
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# CSS personnalisé
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st.markdown("""
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<style>
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.stApp {
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background-color: #1E1E1E;
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}
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.user_message {
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color: white;
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background-color: #F85046;
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padding: 10px;
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border-radius: 10px;
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margin: 10px 20px 10px auto;
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text-align: left;
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word-wrap: break-word;
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display: inline-block;
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max-width: 80%;
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}
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.bot_message {
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color: #1E1E1E;
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background-color: white;
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padding: 10px;
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border-radius: 10px;
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margin: 10px 20px;
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text-align: left;
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word-wrap: break-word;
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display: inline-block;
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max-width: 80%;
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}
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.header {
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font-size: 40px;
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color: white;
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padding: 20px;
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text-align: center;
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border-radius: 10px;
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font-weight: bold;
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}
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.the_text {
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color: #F9F8FD;
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font-size: 20px;
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margin-top: 20px;
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}
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.the_conv {
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color: #F9F8FD;
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font-size: 30px;
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}
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</style>
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""", unsafe_allow_html=True)
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# Interface utilisateur
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st.markdown('<div class="header">Assistant Support Client</div>', unsafe_allow_html=True)
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st.markdown('<div class="the_text">Posez votre question ci-dessous :</div>', unsafe_allow_html=True)
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# Initialisation de la session state
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if 'conversation' not in st.session_state:
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st.session_state.conversation = []
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# Chargement des composants
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documents = load_faq_data()
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| 152 |
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if documents:
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vector_store = initialize_embeddings(documents)
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| 154 |
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if vector_store:
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qa_chain = initialize_qa_chain(vector_store)
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| 156 |
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if qa_chain:
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# Champ de saisie
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user_query = st.text_input("", key="user_input")
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| 159 |
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# Bouton pour obtenir la réponse
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if st.button("Obtenir une réponse", key="submit"):
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if user_query:
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try:
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# Obtention de la réponse
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response = qa_chain({"query": user_query})
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answer = response["result"]
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# Ajout à l'historique
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st.session_state.conversation.append({
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"user": user_query,
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"bot": answer
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})
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# Affichage de la conversation
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| 175 |
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st.markdown('<div class="the_conv">Conversation :</div>', unsafe_allow_html=True)
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for chat in st.session_state.conversation:
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st.markdown(
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f'<div class="user_message">🤵 : {chat["user"]}</div>',
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unsafe_allow_html=True
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)
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st.markdown(
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f'<div class="bot_message">🤖 : {chat["bot"]}</div>',
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| 183 |
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unsafe_allow_html=True
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)
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except Exception as e:
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st.error(f"Erreur lors du traitement de la requête: {str(e)}")
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| 187 |
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else:
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st.warning("Veuillez entrer une question.")
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