Update app.py

app.py

@@ -66,7 +66,10 @@ def search_reviews(df, product_description, n=3, pprint=True):
           print()
     return results,product
 
-prompt = st.text_input("What do you want to search for? : ")
+if prompt is None:
+    st.write("Please enter any dish to get reviews")
+else:
+    prompt = st.text_input("What do you want to search for? : ")
 top_n = st.number_input("How many results do you want to see? : ", min_value = 1)
 results,product = search_reviews(df, prompt, top_n)
 if st.button("Search Reviews"):