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| import re | |
| from pprint import pprint | |
| class MessageComposer: | |
| """ | |
| models: | |
| - mixtral-8x7b (mistralai/Mixtral-8x7B-Instruct-v0.1) | |
| """ | |
| def __init__(self, model: str = None): | |
| self.inst_roles = ["user", "system", "inst"] | |
| self.answer_roles = ["assistant", "bot", "answer"] | |
| def concat_messages_by_role(self, messages): | |
| def is_same_role(role1, role2): | |
| if ( | |
| (role1 == role2) | |
| or (role1 in self.inst_roles and role2 in self.inst_roles) | |
| or (role1 in self.answer_roles and role2 in self.answer_roles) | |
| ): | |
| return True | |
| else: | |
| return False | |
| concat_messages = [] | |
| for message in messages: | |
| role = message["role"] | |
| content = message["content"] | |
| if concat_messages and is_same_role(role, concat_messages[-1]["role"]): | |
| concat_messages[-1]["content"] += "\n" + content | |
| else: | |
| if role in self.inst_roles: | |
| message["role"] = "inst" | |
| elif role in self.answer_roles: | |
| message["role"] = "answer" | |
| else: | |
| message["role"] = "inst" | |
| concat_messages.append(message) | |
| return concat_messages | |
| def merge(self, messages) -> str: | |
| # <s> [INST] Instruction [/INST] Model answer </s> [INST] Follow-up instruction [/INST] | |
| self.messages = self.concat_messages_by_role(messages) | |
| self.merged_str = "" | |
| self.cached_str = "" | |
| for message in self.messages: | |
| role = message["role"] | |
| content = message["content"] | |
| if role in self.inst_roles: | |
| self.cached_str = f"[INST] {content} [/INST]" | |
| elif role in self.answer_roles: | |
| self.merged_str += f"<s> {self.cached_str} {content} </s>\n" | |
| self.cached_str = "" | |
| else: | |
| self.cached_str = f"[INST] {content} [/INST]" | |
| if self.cached_str: | |
| self.merged_str += f"{self.cached_str}" | |
| return self.merged_str | |
| def split(self, merged_str) -> list: | |
| self.messages = [] | |
| self.merged_str = merged_str | |
| pair_pattern = ( | |
| r"<s>\s*\[INST\](?P<inst>[\s\S]*?)\[/INST\](?P<answer>[\s\S]*?)</s>" | |
| ) | |
| pair_matches = re.finditer(pair_pattern, self.merged_str, re.MULTILINE) | |
| pair_matches_list = list(pair_matches) | |
| if len(pair_matches_list) <= 0: | |
| self.messages = [ | |
| { | |
| "role": "user", | |
| "content": self.merged_str, | |
| } | |
| ] | |
| else: | |
| for match in pair_matches_list: | |
| inst = match.group("inst") | |
| answer = match.group("answer") | |
| self.messages.extend( | |
| [ | |
| {"role": "user", "content": inst.strip()}, | |
| {"role": "assistant", "content": answer.strip()}, | |
| ] | |
| ) | |
| inst_pattern = r"\[INST\](?P<inst>[\s\S]*?)\[/INST\]" | |
| inst_matches = re.finditer(inst_pattern, self.merged_str, re.MULTILINE) | |
| inst_matches_list = list(inst_matches) | |
| if len(inst_matches_list) > len(pair_matches_list): | |
| self.messages.extend( | |
| [ | |
| { | |
| "role": "user", | |
| "content": inst_matches_list[-1].group("inst").strip(), | |
| } | |
| ] | |
| ) | |
| return self.messages | |
| if __name__ == "__main__": | |
| composer = MessageComposer() | |
| messages = [ | |
| { | |
| "role": "system", | |
| "content": "You are a LLM developed by OpenAI. Your name is GPT-4.", | |
| }, | |
| {"role": "user", "content": "Hello, who are you?"}, | |
| {"role": "assistant", "content": "I am a bot."}, | |
| # {"role": "user", "content": "What is your name?"}, | |
| {"role": "assistant", "content": "My name is Bing."}, | |
| # {"role": "user", "content": "Tell me a joke."}, | |
| # {"role": "assistant", "content": "What is a robot's favorite type of music?"}, | |
| # { | |
| # "role": "user", | |
| # "content": "How many questions have I asked? Please list them.", | |
| # }, | |
| ] | |
| merged_str = composer.merge(messages) | |
| print(merged_str) | |
| pprint(composer.split(merged_str)) | |
| # print(composer.merge(composer.split(merged_str))) | |