update file treatment

app.py

@@ -1110,9 +1110,10 @@ def chathmi3(message, history2):
             # temp = response.split("(sandbox:/")[1] # (sandbox:/sample-20230805-0807.wav)
             file_name = CheckFileinResp(response)
             print("file_name:", file_name)
-            history2 = history2 + [(None, (file_name,))]
-            Filename_Chatbot = file_name
-            yield ["", history2]
+            if file_name is not "N/A":
+                history2 = history2 + [(None, (file_name,))]
+                Filename_Chatbot = file_name
+                yield ["", history2]
         except:
             print("No need to add file in chatbot")        
 
@@ -1129,9 +1130,11 @@ def CheckFileinResp(response):
     try:
         pattern = r'sample-\w+\.wav'
         result = re.findall(pattern, response)
+        print("result of check file in response:", result)
         return result[-1]
     except Exception as e:
         print("No wav found:", e)
+        return "N/A"
 
 def chathmi4(message, history2):
     global last_request
@@ -1160,9 +1163,10 @@ def chathmi4(message, history2):
             # temp = response.split("(sandbox:/")[1] # (sandbox:/sample-20230805-0807.wav)
             file_name = CheckFileinResp(response)
             print("file_name:", file_name)
-            history2 = history2 + [(None, (file_name,))]
-            Filename_Chatbot = file_name    
-            yield ["", history2, "SUBMIT", "STOP"]        
+            if file_name is not "N/A":
+                history2 = history2 + [(None, (file_name,))]
+                Filename_Chatbot = file_name    
+                yield ["", history2, "SUBMIT", "STOP"]        
         except:
             print("No need to add file in chatbot")