Update app.py

app.py

@@ -28,7 +28,7 @@ def run_chatnt(input_file, custom_question):
         log.write("Request started\n")
 
     if not custom_question or custom_question.strip() == "":
-        None
+        return None
 
     # Read DNA sequences
     dna_sequences = []
@@ -74,10 +74,13 @@ def run_chatnt(input_file, custom_question):
     else:
         return None
     with open(log_file, "a") as log:
-        log.write(f"English prompt : {english_sequence}")
+        log.write(f"Initial user question : {custom_question}")
+        log.write(f"Full english prompt : {english_sequence}")
 
     # Call model
-    log.write("Calling model")
+    with open(log_file, "a") as log:
+        log.write("Calling model")
+        
     output = pipe(
         inputs={
             "english_sequence": english_sequence,
@@ -96,13 +99,13 @@ footer { display: none !important; }
 """
 
 with gr.Blocks(css=css) as demo:
-    gr.Markdown("# 🧬 ChatNT — DNA Sequence Query Assistant")
+    gr.Markdown("# 🧬 ChatNT: A Multimodal Conversational Agent for DNA, RNA and Protein Tasks")
 
     with gr.Row():
         with gr.Column(scale=1):
             input_file = gr.File(
-                label="Upload DNA Sequence File (.fasta or .txt)",
-                file_types=[".fasta", ".fa", ".txt"]
+                label="Upload DNA Sequence File (.fasta)",
+                file_types=[".fasta", ".fa"]
             )
             custom_question = gr.Textbox(
                 label="English Question (required)",