Update app.py

app.py

@@ -42,6 +42,9 @@ def pubmed_search(mesh_terms, email, start_date, end_date):
     if not mesh_terms or not email:
         return "Please provide MeSH terms and email.", None, None
     
+    if start_date is None or end_date is None:
+        return "Please select both start and end dates.", None, None
+
     # Join MeSH terms for query
     query = " AND ".join([f'"{term}"[MeSH Terms]' for term in mesh_terms.split(", ")])
     
@@ -80,8 +83,9 @@ with gr.Blocks() as app:
         add_button = gr.Button("Add MeSH Term")
         mesh_terms_box = gr.Textbox(label="Added MeSH Terms", interactive=False, lines=2)
     
-    start_date = gr.DateTime(label="Start Date and Time")
-    end_date = gr.DateTime(label="End Date and Time")
+    # Default values for date-time fields
+    start_date = gr.DateTime(label="Start Date and Time", value=datetime.now())
+    end_date = gr.DateTime(label="End Date and Time", value=datetime.now())
     email_input = gr.Textbox(label="Email", placeholder="Your email (required by PubMed API)", interactive=True)
     
     search_button = gr.Button("Search PubMed")