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class ChatState: |
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def __init__(self, model, system="", chat_template="auto"): |
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chat_template = ( |
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type(model).__name__ if chat_template == "auto" else chat_template |
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) |
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if chat_template == "Llama3CausalLM": |
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self.__START_TURN_SYSTEM__ = ( |
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"<|start_header_id|>system<|end_header_id|>\n\n" |
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) |
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self.__START_TURN_USER__ = ( |
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"<|start_header_id|>user<|end_header_id|>\n\n" |
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) |
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self.__START_TURN_MODEL__ = ( |
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"<|start_header_id|>assistant<|end_header_id|>\n\n" |
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) |
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self.__END_TURN_SYSTEM__ = "<|eot_id|>" |
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self.__END_TURN_USER__ = "<|eot_id|>" |
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self.__END_TURN_MODEL__ = "<|eot_id|>" |
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print("Using chat template for: Llama") |
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elif chat_template == "GemmaCausalLM": |
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self.__START_TURN_SYSTEM__ = "" |
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self.__START_TURN_USER__ = "<start_of_turn>user\n" |
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self.__START_TURN_MODEL__ = "<start_of_turn>model\n" |
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self.__END_TURN_SYSTEM__ = "\n" |
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self.__END_TURN_USER__ = "<end_of_turn>\n" |
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self.__END_TURN_MODEL__ = "<end_of_turn>\n" |
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print("Using chat template for: Gemma") |
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elif chat_template == "MistralCausalLM": |
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self.__START_TURN_SYSTEM__ = "" |
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self.__START_TURN_USER__ = "[INST]" |
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self.__START_TURN_MODEL__ = "" |
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self.__END_TURN_SYSTEM__ = "<s>" |
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self.__END_TURN_USER__ = "[/INST]" |
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self.__END_TURN_MODEL__ = "</s>" |
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print("Using chat template for: Mistral") |
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elif chat_template == "Vicuna": |
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self.__START_TURN_SYSTEM__ = "" |
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self.__START_TURN_USER__ = "USER: " |
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self.__START_TURN_MODEL__ = "ASSISTANT: " |
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self.__END_TURN_SYSTEM__ = "\n\n" |
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self.__END_TURN_USER__ = "\n" |
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self.__END_TURN_MODEL__ = "</s>\n" |
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print("Using chat template for : Vicuna") |
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else: |
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assert (0, "Unknown turn tags for this model class") |
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self.model = model |
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self.system = system |
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self.history = [] |
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def add_to_history_as_user(self, message): |
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self.history.append( |
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self.__START_TURN_USER__ + message + self.__END_TURN_USER__ |
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) |
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def add_to_history_as_model(self, message): |
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self.history.append( |
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self.__START_TURN_MODEL__ + message + self.__END_TURN_MODEL__ |
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) |
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def get_history(self): |
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return "".join([*self.history]) |
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def get_full_prompt(self): |
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prompt = self.get_history() + self.__START_TURN_MODEL__ |
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if len(self.system) > 0: |
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prompt = ( |
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self.__START_TURN_SYSTEM__ |
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+ self.system |
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+ self.__END_TURN_SYSTEM__ |
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+ prompt |
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) |
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return prompt |
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def send_message(self, message): |
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""" |
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Handles sending a user message and getting a model response. |
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Args: |
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message: The user's message. |
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Returns: |
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The model's response. |
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""" |
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self.add_to_history_as_user(message) |
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prompt = self.get_full_prompt() |
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response = self.model.generate( |
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prompt, max_length=2048, strip_prompt=True |
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) |
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self.add_to_history_as_model(response) |
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return (message, response) |
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