bring back the app.py

app.py

@@ -0,0 +1,47 @@
+import streamlit as st
+from PIL import Image
+
+def main():
+    st.set_page_config(page_title="DR Assistive Tool", layout="centered")
+    
+    st.markdown("<h1 style='text-align: center; color: #2E86C1;'>DR Assistive Tool</h1>", unsafe_allow_html=True)
+
+    st.markdown("""
+    <h4 style='text-align: center; color: grey;'>
+        An AI-powered assistant for early detection of Diabetic Retinopathy
+    </h4>
+    """, unsafe_allow_html=True)
+
+    st.markdown("""---""")
+
+    st.markdown("""
+    ### 🧠 What is DR Assistive Tool?
+    **DR Assistive Tool** is a user-friendly web application built for early and accurate detection of **Diabetic Retinopathy (DR)**—a diabetes-related eye disease that can lead to blindness if not diagnosed in time. This tool uses **AI and deep learning models** trained on retinal images to help healthcare professionals, students, and researchers identify the severity stage of DR.
+
+    By simply uploading a retinal image, the model will:
+    - Analyze the image using advanced machine learning techniques
+    - Predict the stage of Diabetic Retinopathy (No DR, Mild, Moderate, Severe, Proliferative DR)
+    - Provide a quick, reliable, and cost-efficient second opinion for screening
+
+    The app also offers evaluation options to test the model's performance using real datasets, ensuring its credibility and practical usability.
+    """)
+
+    st.markdown("""
+    ---
+    ### 🛠 Features:
+    - 📤 **Upload retinal images** for DR stage prediction
+    - 📊 **Evaluate** the model using real test datasets
+    - 📁 **View results** with interpretation and confidence score
+    - 📈 **Analyze model performance** using accuracy, precision, confusion matrix, and more (in evaluation mode)
+
+    ---
+    ### 📌 How to Use:
+    1. Use the **sidebar** to select a feature (e.g., Predict or Evaluate).
+    2. In **Evaluate**, to check model accuracy.
+    3. In **Predict**, choose an DR image in sample images to predict or upload a high-quality retinal image (JPEG or PNG).
+
+    ⚠️ *Note: This tool is not a diagnostic tool. This is an assistive tool for Doctors.*
+    """)
+
+if __name__ == '__main__':
+    main()