Create pages/1_Python

pages/1_Python

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+import streamlit as st
+import os
+from langchain_huggingface import HuggingFaceEndpoint, ChatHuggingFace
+from langchain_core.messages import HumanMessage, SystemMessage
+
+# Load HuggingFace token from environment variable
+hf = os.getenv('Data_science')
+os.environ['HUGGINGFACEHUB_API_TOKEN'] = hf
+os.environ['HF_TOKEN'] = hf
+
+# Page config
+st.set_page_config(page_title="🐍 Python Mentor Chat", page_icon="💬", layout="centered")
+
+# Inject custom CSS
+st.markdown("""
+    <style>
+    .main {
+        background: linear-gradient(135deg, #1f1c2c 0%, #928dab 100%);
+        padding: 2rem;
+        font-family: 'Segoe UI', sans-serif;
+    }
+    h1, h2, h3, h4, p, label, .css-10trblm, .css-q8sbsg {
+        color: #ffffff !important;
+        text-align: center;
+    }
+    .stTextInput>div>div>input {
+        background-color: #ffffff10;
+        color: #ffffff;
+        border: 1px solid #ffffff50;
+        border-radius: 8px;
+        padding: 0.6em;
+    }
+    .stTextInput>div>div>input::placeholder {
+        color: #ffffff90;
+    }
+    .stButton>button {
+        background: rgba(255, 255, 255, 0.1);
+        border: 2px solid rgba(255, 255, 255, 0.3);
+        color: white;
+        font-size: 18px;
+        font-weight: bold;
+        padding: 0.8em 1.2em;
+        border-radius: 12px;
+        width: 100%;
+        transition: all 0.3s ease;
+        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+    }
+    .stButton>button:hover {
+        background: rgba(255, 255, 255, 0.3);
+        color: white;
+        border-color: white;
+    }
+    .stSidebar > div:first-child {
+        background: #2c3e50;
+        color: white;
+        border-radius: 0 20px 20px 0;
+    }
+    .stSidebar h1, .stSidebar h2, .stSidebar h3, .stSidebar h4, .stSidebar label, .stSidebar p {
+        color: white !important;
+    }
+    hr {
+        border: 1px solid #ffffff50;
+        margin: 1.5em 0;
+    }
+    </style>
+""", unsafe_allow_html=True)
+
+# Title
+st.title("🐍 Python Mentor Chat")
+st.markdown("### 💬 Your personal Python guide for Data Science and beyond!")
+
+# Sidebar configuration
+st.sidebar.title("🧑‍🏫 Mentor Preferences")
+experience_label = st.sidebar.selectbox(
+    "📈 Select your experience level:", ["Beginner", "Intermediate", "Experienced"]
+)
+
+# Load the model
+deep_seek_skeleton = HuggingFaceEndpoint(
+    repo_id='mistralai/Mistral-7B-Instruct-v0.3',
+    provider='novita',
+    temperature=0.7,
+    max_new_tokens=50,
+    task='conversational'
+)
+
+deep_seek = ChatHuggingFace(
+    llm=deep_seek_skeleton,
+    repo_id='mistralai/Mistral-7B-Instruct-v0.3',
+    provider='novita',
+    temperature=0.7,
+    max_new_tokens=50,
+    task='conversational'
+)
+
+# Chat session history key
+PAGE_KEY = "python_chat_history"
+if PAGE_KEY not in st.session_state:
+    st.session_state[PAGE_KEY] = []
+
+# Chat input form
+with st.form(key="chat_form"):
+    user_input = st.text_input("🗣️ Ask your question:", placeholder="e.g. What is a Python decorator?")
+    submit = st.form_submit_button("🚀 Send")
+
+# Chat logic
+if submit and user_input:
+    system_prompt = (
+        f"Act as a Python mentor for a {experience_label.lower()} learner. "
+        f"Answer in a helpful, friendly, and concise manner. Max 150 words. "
+        f"If the question is not Python-related, say it's out of scope politely."
+    )
+    messages = [SystemMessage(content=system_prompt), HumanMessage(content=user_input)]
+    result = deep_seek.invoke(messages)
+    st.session_state[PAGE_KEY].append((user_input, result.content))
+
+# Display chat history
+st.subheader("📜 Chat History")
+for user, bot in st.session_state[PAGE_KEY]:
+    st.markdown(f"**🧑 You:** {user}")
+    st.markdown(f"**🤖 Mentor:** {bot}")
+    st.markdown("---")