Update app.py

app.py

@@ -8,6 +8,34 @@ import spacy
 from spacy import displacy
 import en_ner_bc5cdr_md
 
+from streamlit.components.v1 import html
+
+def nav_page(page_name, timeout_secs=3):
+    nav_script = """
+        <script type="text/javascript">
+            function attempt_nav_page(page_name, start_time, timeout_secs) {
+                var links = window.parent.document.getElementsByTagName("a");
+                for (var i = 0; i < links.length; i++) {
+                    if (links[i].href.toLowerCase().endsWith("/" + page_name.toLowerCase())) {
+                        links[i].click();
+                        return;
+                    }
+                }
+                var elasped = new Date() - start_time;
+                if (elasped < timeout_secs * 1000) {
+                    setTimeout(attempt_nav_page, 100, page_name, start_time, timeout_secs);
+                } else {
+                    alert("Unable to navigate to page '" + page_name + "' after " + timeout_secs + " second(s).");
+                }
+            }
+            window.addEventListener("load", function() {
+                attempt_nav_page("%s", new Date(), %d);
+            });
+        </script>
+    """ % (page_name, timeout_secs)
+    html(nav_script)
+    
+
 # Store the initial value of widgets in session state
 if "visibility" not in st.session_state:
     st.session_state.visibility = "visible"