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app.py

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+# app.py
+import gradio as gr
+from openai import OpenAI
+import os
+from dotenv import load_dotenv
+
+# Load API key (from .env or Colab environment)
+load_dotenv()
+client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
+
+SYSTEM_PROMPT = (
+    "You are a kind and professional healthcare assistant. "
+    "Provide general medical information, healthy lifestyle advice, "
+    "and explanations for symptoms. "
+    "Do NOT give strict diagnoses or prescribe medications. "
+    "Always remind users to consult a doctor for confirmation."
+)
+
+def chat_with_bot(history, user_message):
+    """Chatbot logic for Gradio"""
+    messages = [{"role": "system", "content": SYSTEM_PROMPT}]
+    for h in history:
+        messages.append({"role": "user", "content": h[0]})
+        messages.append({"role": "assistant", "content": h[1]})
+    messages.append({"role": "user", "content": user_message})
+
+    try:
+        response = client.chat.completions.create(
+            model="gpt-4o-mini",
+            messages=messages
+        )
+        reply = response.choices[0].message.content
+    except Exception as e:
+        reply = f"⚠️ Error: {str(e)}"
+    history.append((user_message, reply))
+    return history, ""
+
+# Gradio Chat Interface
+chatbot = gr.Chatbot(
+    label="🩺 Healthcare Assistant",
+    avatar_images=["https://cdn-icons-png.flaticon.com/512/3774/3774299.png", None]
+)
+
+demo = gr.Blocks()
+with demo:
+    gr.Markdown("# 🩺 AI Healthcare Chatbot")
+    gr.Markdown("💬 I'm here to provide **general health information** — not a replacement for a doctor.")
+    state = gr.State([])
+    with gr.Row():
+        chatbot.render()
+    with gr.Row():
+        msg = gr.Textbox(placeholder="Describe your symptoms or ask a health question...", show_label=False)
+        send = gr.Button("Send", variant="primary")
+    send.click(chat_with_bot, [state, msg], [state, msg])
+    msg.submit(chat_with_bot, [state, msg], [state, msg])
+    gr.Markdown("⚠️ **Disclaimer:** This chatbot provides general information and is **not** a substitute for professional medical advice.")
+
+# Run
+if __name__ == "__main__":
+    demo.launch()

requirements.txt

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+streamlit
+openai
+python-dotenv