Update README.md

README.md

@@ -31,11 +31,11 @@ LinguaMatic utilizes the llama2 prompting method to generate responses. This met
 ```python
 def llama_prompt(
     message: str,
-    chat_history,
-    system: str
+    chat_history: list = None,
+    system: str = None
 ) -> str:
     do_strip = False
-    texts = [f"<s>[INST] <<SYS>>\n{system}\n<</SYS>>\n\n"] if system is not None else "<s>[INST] "
+    texts = [f"<s>[INST] <<SYS>>\n{system}\n<</SYS>>\n\n"] if system is not None else ["<s>[INST] "]
     for user_input, response in chat_history:
         user_input = user_input.strip() if do_strip else user_input
         do_strip = True