add pre_filter flag

app.py

@@ -13,6 +13,9 @@ class GPT4News():
         self.name2prompt = {x['name']: x for x in prompt_formats}
 
     def preprocess(self, function_name, input_txt):
+        if not self.name2prompt[function_name]['pre_filter']:
+            return [input_txt]
+            
         max_length = self.name2prompt[function_name]['split_length']
         max_convs = self.name2prompt[function_name]['split_round']