Update app.py

app.py

@@ -18,11 +18,12 @@ st.title("Stupid jokes with transformers")
 st.write("Write question you want to see a funny answer for.")
 sent = st.text_area("Text", height = 100)
 
-max_source_length = 64
-max_target_length = 32
-prefix = "Answer the following question in a funny way: "
-
-input_ids = tokenizer(prefix + sent, max_length=max_source_length, truncation=True, return_tensors="pt").input_ids
-generated_sequence = infer(input_ids)
-
-st.write(generated_sequence)
+if sent:
+    max_source_length = 64
+    max_target_length = 32
+    prefix = "Answer the following question in a funny way: "
+    
+    input_ids = tokenizer(prefix + sent, max_length=max_source_length, truncation=True, return_tensors="pt").input_ids
+    generated_sequence = infer(input_ids)
+    
+    st.write(generated_sequence)