Update

app.py

@@ -218,8 +218,11 @@ def bot(history):
 
     with about_time() as atime:  # type: ignore
         flag = 1
+
+        # to silence pyright
         prefix = ""
         prelude = 0.0
+
         then = time.time()
 
         logger.debug("about to generate")
@@ -239,11 +242,16 @@ def bot(history):
             response.append(elm)
             history[-1][1] = prefix + "".join(response)
             yield history
-
+    temp1 = ""
+    if len(user_message) > 0:
+        temp1 = f"{prelude/len(user_message):.2f}s/char, "
+    temp2 = ""
+    if len(''.join(response)) > 0:
+        temp2 = f"{(atime.duration - prelude)/len(''.join(response)):.2f}s/char)"  # type: ignore
     _ = (
         f"(time elapsed: {atime.duration_human}, "  # type: ignore
-        f"{prelude/len(user_message):.2f}s/char"
-        f"{(atime.duration - prelude)/len(''.join(response)):.2f}s/char)"  # type: ignore
+        f"{temp1}"
+        f"{temp2}"
     )
 
     history[-1][1] = "".join(response)  + f"\n{_}"