Update app.py

app.py

@@ -50,9 +50,9 @@ def filter_product(question, dataset):
     for pr in ["web", "net", "js", "wpf", "php", "blazor", "angular", "java"]:
         if re.search(f"{pr}\\b", question, re.IGNORECASE) is not None: product = pr
 
-    if (product_line is not "") or (product is not ""):
-        product_line_filter = partial(filter_f, field = "product_line", value = product_line) if product_line is not "" else lambda x: True
-        product_filter = partial(filter_f, field = "product", value = product) if product is not "" else lambda x: True
+    if (product_line != "") or (product != ""):
+        product_line_filter = partial(filter_f, field = "product_line", value = product_line) if product_line != "" else lambda x: True
+        product_filter = partial(filter_f, field = "product", value = product) if product != "" else lambda x: True
 
         dataset.drop_index("embeddings")
         dataset = dataset.filter(lambda x: product_line_filter(x) and product_filter(x))