mirror of
https://github.com/deepseek-ai/DeepSeek-VL
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349 lines
11 KiB
Python
349 lines
11 KiB
Python
# Copyright (c) 2023-2024 DeepSeek.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy of
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# this software and associated documentation files (the "Software"), to deal in
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# the Software without restriction, including without limitation the rights to
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# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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# the Software, and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""
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From https://github.com/lm-sys/FastChat/blob/main/fastchat/conversation.py
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"""
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import dataclasses
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from enum import IntEnum, auto
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from typing import Dict, List
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class SeparatorStyle(IntEnum):
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"""Separator styles."""
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ADD_COLON_SINGLE = auto()
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ADD_COLON_TWO = auto()
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ADD_COLON_SPACE_SINGLE = auto()
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NO_COLON_SINGLE = auto()
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NO_COLON_TWO = auto()
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ADD_NEW_LINE_SINGLE = auto()
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LLAMA2 = auto()
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CHATGLM = auto()
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CHATML = auto()
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CHATINTERN = auto()
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DOLLY = auto()
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RWKV = auto()
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PHOENIX = auto()
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ROBIN = auto()
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DeepSeek = auto()
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PLAIN = auto()
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ALIGNMENT = auto()
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@dataclasses.dataclass
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class Conversation:
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"""A class that manages prompt templates and keeps all conversation history."""
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# The name of this template
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name: str
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# The template of the system prompt
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system_template: str = "{system_message}"
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# The system message
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system_message: str = ""
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# The names of two roles
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roles: List[str] = (("USER", "ASSISTANT"),)
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# All messages. Each item is (role, message).
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messages: List[List[str]] = ()
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# The number of few shot examples
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offset: int = 0
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# The separator style and configurations
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sep_style: SeparatorStyle = SeparatorStyle.ADD_COLON_SINGLE
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sep: str = "\n"
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sep2: str = None
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# Stop criteria (the default one is EOS token)
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stop_str: str = None
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# Stops generation if meeting any token in this list
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stop_token_ids: List[int] = None
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def get_prompt(self) -> str:
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"""Get the prompt for generation."""
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system_prompt = self.system_template.format(system_message=self.system_message)
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if self.sep_style == SeparatorStyle.DeepSeek:
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seps = [self.sep, self.sep2]
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if system_prompt == "" or system_prompt is None:
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ret = ""
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else:
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ret = system_prompt + seps[0]
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for i, (role, message) in enumerate(self.messages):
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if message:
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ret += role + ": " + message + seps[i % 2]
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else:
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ret += role + ":"
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return ret
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elif self.sep_style == SeparatorStyle.LLAMA2:
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seps = [self.sep, self.sep2]
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if self.system_message:
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ret = system_prompt
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else:
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ret = "[INST] "
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for i, (role, message) in enumerate(self.messages):
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tag = self.roles[i % 2]
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if message:
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if type(message) is tuple: # multimodal message
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message, _ = message
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if i == 0:
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ret += message + " "
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else:
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ret += tag + " " + message + seps[i % 2]
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else:
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ret += tag
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return ret
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elif self.sep_style == SeparatorStyle.PLAIN:
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seps = [self.sep, self.sep2]
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ret = ""
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for i, (role, message) in enumerate(self.messages):
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if message:
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if type(message) is tuple:
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message, _, _ = message
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if i % 2 == 0:
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ret += message + seps[i % 2]
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else:
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ret += message + seps[i % 2]
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else:
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ret += ""
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return ret
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elif self.sep_style == SeparatorStyle.ALIGNMENT:
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seps = [self.sep, self.sep2]
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ret = ""
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for i, (role, message) in enumerate(self.messages):
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if message:
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if type(message) is tuple:
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message, _, _ = message
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if i % 2 == 0:
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ret += "<image>\n" + seps[i % 2]
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else:
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ret += message + seps[i % 2]
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else:
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ret += ""
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return ret
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else:
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raise ValueError(f"Invalid style: {self.sep_style}")
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def get_prompt_for_current_round(self, content=None):
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"""Get current round formatted question prompt during sft training"""
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if self.sep_style == SeparatorStyle.PLAIN:
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formatted_question = "<image>\n"
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elif self.sep_style == SeparatorStyle.DeepSeek:
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formatted_question = (
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f"{self.roles[0]}: " + content.strip() + self.sep + f"{self.roles[1]}:"
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)
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else:
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raise ValueError(f"Unsupported sep_style: {self.sep_style}")
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return formatted_question
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def set_system_message(self, system_message: str):
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"""Set the system message."""
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self.system_message = system_message
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def append_message(self, role: str, message: str):
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"""Append a new message."""
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self.messages.append([role, message])
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def reset_message(self):
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"""Reset a new message."""
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self.messages = []
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def update_last_message(self, message: str):
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"""Update the last output.
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The last message is typically set to be None when constructing the prompt,
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so we need to update it in-place after getting the response from a model.
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"""
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self.messages[-1][1] = message
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def to_gradio_chatbot(self):
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"""Convert the conversation to gradio chatbot format."""
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ret = []
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for i, (role, msg) in enumerate(self.messages[self.offset :]):
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if i % 2 == 0:
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ret.append([msg, None])
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else:
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ret[-1][-1] = msg
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return ret
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def to_openai_api_messages(self):
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"""Convert the conversation to OpenAI chat completion format."""
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system_prompt = self.system_template.format(system_message=self.system_message)
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ret = [{"role": "system", "content": system_prompt}]
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for i, (_, msg) in enumerate(self.messages[self.offset :]):
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if i % 2 == 0:
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ret.append({"role": "user", "content": msg})
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else:
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if msg is not None:
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ret.append({"role": "assistant", "content": msg})
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return ret
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def copy(self):
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return Conversation(
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name=self.name,
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system_template=self.system_template,
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system_message=self.system_message,
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roles=self.roles,
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messages=[[x, y] for x, y in self.messages],
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offset=self.offset,
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sep_style=self.sep_style,
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sep=self.sep,
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sep2=self.sep2,
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stop_str=self.stop_str,
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stop_token_ids=self.stop_token_ids,
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)
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def dict(self):
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return {
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"template_name": self.name,
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"system_message": self.system_message,
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"roles": self.roles,
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"messages": self.messages,
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"offset": self.offset,
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}
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# A global registry for all conversation templates
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conv_templates: Dict[str, Conversation] = {}
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def register_conv_template(template: Conversation, override: bool = False):
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"""Register a new conversation template."""
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if not override:
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assert (
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template.name not in conv_templates
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), f"{template.name} has been registered."
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conv_templates[template.name] = template
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def get_conv_template(name: str) -> Conversation:
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"""Get a conversation template."""
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return conv_templates[name].copy()
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# llava_llama2 template
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register_conv_template(
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Conversation(
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name="llava_llama2",
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system_message="You are a helpful language and vision assistant. "
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"You are able to understand the visual content that the user provides, "
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"and assist the user with a variety of tasks using natural language.",
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system_template="[INST] <<SYS>>\n{system_message}\n<</SYS>>\n\n",
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roles=("[INST]", "[/INST]"),
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messages=(),
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offset=0,
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sep_style=SeparatorStyle.LLAMA2,
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sep=" ",
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sep2=" </s><s>",
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stop_token_ids=[2],
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)
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)
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# llama2 template
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# reference: https://github.com/facebookresearch/llama/blob/cfc3fc8c1968d390eb830e65c63865e980873a06/llama/generation.py#L212
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register_conv_template(
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Conversation(
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name="llama-2",
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system_template="[INST] <<SYS>>\n{system_message}\n<</SYS>>\n\n",
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roles=("[INST]", "[/INST]"),
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messages=(),
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offset=0,
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sep_style=SeparatorStyle.LLAMA2,
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sep=" ",
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sep2=" </s><s>",
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stop_token_ids=[2],
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)
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)
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# deepseek template
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register_conv_template(
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Conversation(
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name="deepseek",
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system_template="{system_message}",
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# system_message="You are a helpful assistant. Please answer truthfully and write out your "
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# "thinking step by step to be sure you get the right answer.",
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system_message="",
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roles=("User", "Assistant"),
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messages=(),
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offset=0,
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sep_style=SeparatorStyle.DeepSeek,
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sep="\n\n",
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sep2="<｜end▁of▁sentence｜>",
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stop_token_ids=[100001],
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stop_str=["User:", "<｜end▁of▁sentence｜>"],
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)
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)
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register_conv_template(
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Conversation(
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name="plain",
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system_template="",
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system_message="",
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roles=("", ""),
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messages=(),
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offset=0,
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sep_style=SeparatorStyle.PLAIN,
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sep="",
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sep2="",
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stop_token_ids=[2],
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stop_str=["</s>"],
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)
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)
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register_conv_template(
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Conversation(
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name="alignment",
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system_template="",
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system_message="",
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roles=("", ""),
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messages=(),
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offset=0,
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sep_style=SeparatorStyle.ALIGNMENT,
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sep="",
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sep2="",
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stop_token_ids=[2],
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stop_str=["</s>"],
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)
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)
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if __name__ == "__main__":
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# print("Llama-2 template:")
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# conv = get_conv_template("llama-2")
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# conv.set_system_message("You are a helpful, respectful and honest assistant.")
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# conv.append_message(conv.roles[0], "Hello!")
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# conv.append_message(conv.roles[1], "Hi!")
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# conv.append_message(conv.roles[0], "How are you?")
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# conv.append_message(conv.roles[1], None)
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# print(conv.get_prompt())
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# print("\n")
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print("deepseek template:")
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conv = get_conv_template("deepseek")
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conv.append_message(conv.roles[0], "Hello!")
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conv.append_message(conv.roles[1], "Hi! This is Tony.")
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conv.append_message(conv.roles[0], "Who are you?")
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conv.append_message(conv.roles[1], "I am a helpful assistant.")
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conv.append_message(conv.roles[0], "How are you?")
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conv.append_message(conv.roles[1], None)
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print(conv.get_prompt())
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