Create app.py

app.py

@@ -0,0 +1,35 @@
+# homepage.py
+import streamlit as st
+import runpy
+
+# 1. Page config & title
+st.set_page_config(page_title="Machine Learning Models Visualization tools")
+st.title("Machine Learning Models Visualization tools")
+
+# 2. Map display names → filenames
+APPS = {
+    "Gradient Descent Visualization":          "gd_sgd_app.py",
+    "Decision Tree (each step)":                "decision_tree_steps.py",
+    "Bagging Classifier Visualization":         "bagging_classifier_viz.py",
+    "Bagging Regressor Visualization":          "bagging_regressor_viz.py",
+    "Voting Classifier Visualization":          "voting_classifier_viz.py",
+    "Voting Regressor Visualization":           "voting_regressor_viz.py",
+    "Decision Tree Visualization":              "decision_tree_viz.py",
+}
+
+# 3. See if the user clicked into one of the apps already
+params   = st.experimental_get_query_params()
+selected = params.get("app", [None])[0]
+
+if selected in APPS.values():
+    # rerun the selected app
+    runpy.run_path(selected, run_name="__main__")
+else:
+    # 4. Otherwise show the grid of buttons
+    cols = st.columns(2)
+    for idx, (label, fname) in enumerate(APPS.items()):
+        col = cols[idx % 2]
+        # style each button like a “box”
+        if col.button(label, key=label):
+            # set query‑param and trigger rerun
+            st.experimental_set_query_params(app=fname)