Create app.py (#1)

- Create app.py (de93aaf4936422c6a9aadb78fd830b771e570569)

app.py

@@ -0,0 +1,23 @@
+def switch_page(page_name: str):
+    from streamlit.runtime.scriptrunner import RerunData, RerunException
+    from streamlit.source_util import get_pages
+
+    def standardize_name(name: str) -> str:
+        return name.lower().replace("_", " ")
+
+    page_name = standardize_name(page_name)
+
+    pages = get_pages("home.py")  # OR whatever your main page is called
+
+    for page_hash, config in pages.items():
+        if standardize_name(config["page_name"]) == page_name:
+            raise RerunException(
+                RerunData(
+                    page_script_hash=page_hash,
+                    page_name=page_name,
+                )
+            )
+
+    page_names = [standardize_name(config["page_name"]) for config in pages.values()]
+
+    raise ValueError(f"Could not find page {page_name}. Must be one of {page_names}")