Update app.py

app.py

@@ -137,6 +137,53 @@ if 'model' not in st.session_state:
 if 'preprocessor' not in st.session_state:
     st.session_state.preprocessor = None # to store the column transformer
 
+# Initialize session state for uploaded data
+if 'uploaded_data' not in st.session_state:
+    st.session_state.uploaded_data = None
+
+# File Upload Section
+uploaded_file = st.sidebar.file_uploader("Upload a CSV or Excel file", type=["csv", "xlsx"], help="Upload your dataset here. Supported formats: CSV, XLSX")
+if uploaded_file is not None:
+    try:
+        df = pd.read_csv(uploaded_file)
+        st.session_state.cleaned_data = df
+        st.session_state.uploaded_data = df  # Add to session state
+        st.success("Data loaded successfully!")
+    except Exception as e:
+        st.error(f"Error loading data: {e}")
+
+# Sidebar Navigation
+st.sidebar.title("🔮 Data Wizard Pro")
+
+# Apply custom CSS to change text color in the sidebar
+st.markdown(
+    """
+    <style>
+    [data-testid="stSidebar"] {
+        color: #00f7ff; /* Cyan color for sidebar text */
+    }
+    </style>
+    """,
+    unsafe_allow_html=True,
+)
+
+# Navigation and Page Logic
+app_mode = st.sidebar.radio("Navigate", [
+    "Data Upload",
+    "Smart Cleaning",
+    "Advanced EDA",
+    "Model Training",
+    "Predictions",
+    "Visualization Lab",
+    "Neural Network Studio"
+])
+
+# Access the cleaned data in your app's pages
+if st.session_state.uploaded_data is not None:
+    df = st.session_state.uploaded_data.copy()
+else:
+    st.warning("Please upload a CSV file.")
+
 
 # --- Progress Bar ----
 def animated_progress_bar(progress_var, message="Processing..."):