737 lines
27 KiB
Python
737 lines
27 KiB
Python
# Copyright 2023-2024 SGLang Team
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Conversation chat templates."""
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# Adapted from
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# https://github.com/lm-sys/FastChat/blob/main/fastchat/conversation.py
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import dataclasses
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from enum import IntEnum, auto
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from typing import Dict, List, Optional, Tuple, Union
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from sglang.srt.openai_api.protocol import ChatCompletionRequest
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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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LLAMA3 = 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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FALCON_CHAT = auto()
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CHATGLM3 = auto()
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DEEPSEEK_CHAT = auto()
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METAMATH = auto()
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DeepSeekVL2 = auto()
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QWEN2_VL_EMBED = auto()
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GEMMA3 = 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: Tuple[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: Union[str, List[str]] = None
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# The string that represents an image token in the prompt
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image_token: str = "<image>"
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audio_token: str = "<audio>"
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image_data: Optional[List[str]] = None
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modalities: Optional[List[str]] = None
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stop_token_ids: Optional[int] = None
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audio_data: Optional[List[str]] = 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.ADD_COLON_SINGLE:
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ret = system_prompt + self.sep
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for role, message in self.messages:
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if message:
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ret += role + ": " + message + self.sep
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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.ADD_COLON_TWO:
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seps = [self.sep, self.sep2]
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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.ADD_COLON_SPACE_SINGLE:
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ret = system_prompt + self.sep
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for role, message in self.messages:
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if message:
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ret += role + ": " + message + self.sep
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else:
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ret += role + ": " # must be end with a space
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return ret
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elif self.sep_style == SeparatorStyle.ADD_NEW_LINE_SINGLE:
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ret = "" if system_prompt == "" else system_prompt + self.sep
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for role, message in self.messages:
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if message:
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ret += role + "\n" + message + self.sep
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else:
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ret += role + "\n"
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return ret
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elif self.sep_style == SeparatorStyle.QWEN2_VL_EMBED:
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ret = "" if system_prompt == "" else system_prompt + self.sep
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for role, message in self.messages:
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if message:
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ret += role + "\n" + message + self.sep
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else:
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ret += role + "\n"
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ret += self.stop_str
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return ret
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elif self.sep_style == SeparatorStyle.NO_COLON_SINGLE:
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ret = system_prompt
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for role, message in self.messages:
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if message:
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ret += role + message + self.sep
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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.NO_COLON_TWO:
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seps = [self.sep, self.sep2]
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ret = system_prompt
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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.RWKV:
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ret = system_prompt
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for i, (role, message) in enumerate(self.messages):
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if message:
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ret += (
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role
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+ ": "
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+ message.replace("\r\n", "\n").replace("\n\n", "\n")
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)
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ret += "\n\n"
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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.LLAMA3:
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ret = "<|begin_of_text|>"
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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 += ""
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for i, (role, message) in enumerate(self.messages):
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if message:
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ret += f"<|start_header_id|>{role}<|end_header_id|>\n\n"
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ret += f"{message.strip()}<|eot_id|>"
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else:
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ret += f"<|start_header_id|>{role}<|end_header_id|>\n\n"
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# print(ret)
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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 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.CHATGLM:
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# source: https://huggingface.co/THUDM/chatglm-6b/blob/1d240ba371910e9282298d4592532d7f0f3e9f3e/modeling_chatglm.py#L1302-L1308
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# source2: https://huggingface.co/THUDM/chatglm2-6b/blob/e186c891cf64310ac66ef10a87e6635fa6c2a579/modeling_chatglm.py#L926
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round_add_n = 1 if self.name == "chatglm2" else 0
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if system_prompt:
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ret = system_prompt + self.sep
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else:
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ret = ""
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for i, (role, message) in enumerate(self.messages):
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if i % 2 == 0:
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ret += f"[Round {i // 2 + round_add_n}]{self.sep}"
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if message:
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ret += f"{role}：{message}{self.sep}"
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else:
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ret += f"{role}："
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return ret
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elif self.sep_style == SeparatorStyle.CHATML:
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ret = "" if system_prompt == "" else system_prompt + self.sep + "\n"
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for role, message in self.messages:
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if message:
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ret += role + "\n" + message + self.sep + "\n"
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else:
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ret += role + "\n"
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return ret
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elif self.sep_style == SeparatorStyle.CHATGLM3:
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ret = ""
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if self.system_message:
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ret += system_prompt
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for role, message in self.messages:
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if message:
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ret += role + "\n" + message
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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.CHATINTERN:
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# source: https://huggingface.co/internlm/internlm-chat-7b-8k/blob/bd546fa984b4b0b86958f56bf37f94aa75ab8831/modeling_internlm.py#L771
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seps = [self.sep, self.sep2]
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ret = system_prompt
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for i, (role, message) in enumerate(self.messages):
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if i % 2 == 0:
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ret += "<s>"
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if message:
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ret += role + ":" + message + seps[i % 2] + "\n"
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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.DOLLY:
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seps = [self.sep, self.sep2]
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ret = system_prompt
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for i, (role, message) in enumerate(self.messages):
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if message:
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ret += role + ":\n" + message + seps[i % 2]
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if i % 2 == 1:
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ret += "\n\n"
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else:
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ret += role + ":\n"
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return ret
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elif self.sep_style == SeparatorStyle.PHOENIX:
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ret = system_prompt
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for role, message in self.messages:
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if message:
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ret += role + ": " + "<s>" + message + "</s>"
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else:
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ret += role + ": " + "<s>"
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return ret
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elif self.sep_style == SeparatorStyle.ROBIN:
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ret = system_prompt + self.sep
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for role, message in self.messages:
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if message:
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ret += role + ":\n" + message + self.sep
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else:
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ret += role + ":\n"
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return ret
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elif self.sep_style == SeparatorStyle.FALCON_CHAT:
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ret = ""
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if self.system_message:
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ret += system_prompt + self.sep
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for role, message in self.messages:
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if message:
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ret += role + ": " + message + self.sep
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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.METAMATH:
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ret = "" if system_prompt == "" else system_prompt + self.sep
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for i, (role, message) in enumerate(self.messages):
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# For MetaMath, sep2 is used to prefix the message.
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starting_sep = ":\n" if i % 2 == 0 else ": " + self.sep2
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ending_sep = self.sep if i % 2 == 0 else ""
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if message:
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ret += role + starting_sep + message + ending_sep
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else:
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ret += role + starting_sep
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return ret
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elif self.sep_style == SeparatorStyle.DEEPSEEK_CHAT:
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seps = [self.sep, self.sep2]
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ret = system_prompt
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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.DeepSeekVL2:
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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.GEMMA3:
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ret = system_prompt
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for i, (role, message) in enumerate(self.messages):
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if message:
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if i == 0:
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ret += message + self.sep
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else:
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ret += role + message + self.sep
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else:
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ret += role
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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 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 append_image(self, image: str):
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"""Append a new message."""
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self.image_data.append(image)
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def append_audio(self, audio: str):
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"""Append a new message."""
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self.audio_data.append(audio)
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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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if self.system_message == "":
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ret = []
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else:
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ret = [{"role": "system", "content": self.system_message}]
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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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image_token=self.image_token,
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audio_token=self.audio_token,
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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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chat_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 chat_templates
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), f"{template.name} has been registered."
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chat_templates[template.name] = template
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def chat_template_exists(template_name: str) -> bool:
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return template_name in chat_templates
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def generate_embedding_convs(
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texts: List[str], images: List[str], template_name: str
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) -> List[Conversation]:
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conv_template = chat_templates[template_name].copy()
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convs = []
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for text, image in zip(texts, images):
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conv = Conversation(
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name=conv_template.name,
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system_template=conv_template.system_template,
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system_message=conv_template.system_message,
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roles=conv_template.roles,
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messages=list(conv_template.messages), # prevent in-place modification
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offset=conv_template.offset,
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sep_style=SeparatorStyle(conv_template.sep_style),
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sep=conv_template.sep,
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sep2=conv_template.sep2,
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stop_str=conv_template.stop_str,
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image_data=[],
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modalities=[],
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image_token=conv_template.image_token,
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)
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real_content = ""
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if image is not None:
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image_token = (
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conv.image_token + "\n"
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if conv.name != "gme-qwen2-vl"
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else conv.image_token
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)
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real_content += image_token
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if text is not None:
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real_content += text
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conv.append_message(conv.roles[0], real_content)
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# Add a blank message for the assistant.
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conv.append_message(conv.roles[1], None)
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convs.append(conv)
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return convs
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def generate_chat_conv(
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request: ChatCompletionRequest, template_name: str
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) -> Conversation:
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conv = chat_templates[template_name].copy()
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conv = Conversation(
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name=conv.name,
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system_template=conv.system_template,
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system_message=conv.system_message,
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roles=conv.roles,
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messages=list(conv.messages), # prevent in-place modification
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offset=conv.offset,
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sep_style=SeparatorStyle(conv.sep_style),
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sep=conv.sep,
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sep2=conv.sep2,
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stop_str=conv.stop_str,
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image_data=[],
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audio_data=[],
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modalities=[],
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image_token=conv.image_token,
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audio_token=conv.audio_token,
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)
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if isinstance(request.messages, str):
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raise ValueError("The messages should be a list of dict.")
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for message in request.messages:
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msg_role = message.role
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if msg_role == "system":
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if isinstance(message.content, str):
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conv.system_message = message.content
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elif isinstance(message.content, list):
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if (
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len(message.content) != 1
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or getattr(message.content[0], "type", None) != "text"
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):
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raise ValueError("The system message should be a single text.")
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else:
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conv.system_message = getattr(message.content[0], "text", "")
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elif msg_role == "user":
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# Handle the various types of Chat Request content types here.
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if isinstance(message.content, str):
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conv.append_message(conv.roles[0], message.content)
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else:
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real_content = ""
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# calculate number of image_url
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num_image_url = 0
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for content in message.content:
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if content.type == "image_url":
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num_image_url += 1
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conv.modalities.append(content.modalities)
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if num_image_url > 1:
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image_token = conv.image_token
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else:
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image_token = (
|
||
conv.image_token + "\n"
|
||
if conv.name != "qwen2-vl"
|
||
else conv.image_token
|
||
)
|
||
audio_token = conv.audio_token
|
||
for content in message.content:
|
||
if content.type == "text":
|
||
if num_image_url > 16:
|
||
real_content += "\n" # for video
|
||
real_content += content.text
|
||
elif content.type == "image_url":
|
||
# NOTE: Only works for llava
|
||
real_content += image_token
|
||
conv.append_image(content.image_url.url)
|
||
elif content.type == "audio_url":
|
||
real_content += audio_token
|
||
conv.append_audio(content.audio_url.url)
|
||
|
||
conv.append_message(conv.roles[0], real_content)
|
||
elif msg_role == "assistant":
|
||
parsed_content = ""
|
||
if isinstance(message.content, str):
|
||
parsed_content = message.content
|
||
elif isinstance(message.content, list):
|
||
if (
|
||
len(message.content) != 1
|
||
or getattr(message.content[0], "type", None) != "text"
|
||
):
|
||
raise ValueError(
|
||
"The assistant's response should be a single text."
|
||
)
|
||
else:
|
||
parsed_content = getattr(message.content[0], "text", "")
|
||
conv.append_message(conv.roles[1], parsed_content)
|
||
else:
|
||
raise ValueError(f"Unknown role: {msg_role}")
|
||
|
||
# Add a blank message for the assistant.
|
||
conv.append_message(conv.roles[1], None)
|
||
return conv
|
||
|
||
|
||
# llama2 template
|
||
# reference: https://huggingface.co/blog/codellama#conversational-instructions
|
||
# reference: https://github.com/facebookresearch/llama/blob/1a240688810f8036049e8da36b073f63d2ac552c/llama/generation.py#L212
|
||
register_conv_template(
|
||
Conversation(
|
||
name="llama-2",
|
||
system_template="[INST] <<SYS>>\n{system_message}\n<</SYS>>\n\n",
|
||
roles=("[INST]", "[/INST]"),
|
||
sep_style=SeparatorStyle.LLAMA2,
|
||
sep=" ",
|
||
sep2=" </s><s>",
|
||
stop_str=["[INST]", "[/INST]", "<<SYS>>", "<</SYS>>"],
|
||
)
|
||
)
|
||
|
||
register_conv_template(
|
||
Conversation(
|
||
name="chatml",
|
||
system_template="<|im_start|>system\n{system_message}",
|
||
system_message="You are a helpful assistant.",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep_style=SeparatorStyle.CHATML,
|
||
sep="<|im_end|>",
|
||
stop_str=["<|endoftext|>", "<|im_end|>"],
|
||
)
|
||
)
|
||
|
||
register_conv_template(
|
||
Conversation(
|
||
name="chatml-llava",
|
||
system_template="<|im_start|>system\n{system_message}",
|
||
system_message="You are a helpful assistant.",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep_style=SeparatorStyle.CHATML,
|
||
sep="<|im_end|>",
|
||
stop_str=["<|endoftext|>", "<|im_end|>"],
|
||
)
|
||
)
|
||
|
||
register_conv_template(
|
||
Conversation(
|
||
name="vicuna_v1.1",
|
||
system_message="A chat between a curious user and an artificial intelligence assistant. "
|
||
"The assistant gives helpful, detailed, and polite answers to the user's questions.",
|
||
roles=("USER", "ASSISTANT"),
|
||
sep_style=SeparatorStyle.ADD_COLON_TWO,
|
||
sep=" ",
|
||
sep2="</s>",
|
||
)
|
||
)
|
||
|
||
register_conv_template(
|
||
Conversation(
|
||
name="llama_3_vision",
|
||
system_message="You are a helpful language and vision assistant. You are able to understand the visual content that the user provides, and assist the user with a variety of tasks using natural language.",
|
||
system_template="<|start_header_id|>system<|end_header_id|>\n\n{system_message}<|eot_id|>",
|
||
roles=("user", "assistant"),
|
||
sep_style=SeparatorStyle.LLAMA3,
|
||
sep="",
|
||
stop_str=["<|end_of_text|>", "<|eot_id|>"],
|
||
image_token="<|image|>",
|
||
)
|
||
)
|
||
|
||
register_conv_template(
|
||
Conversation(
|
||
name="llava_llama_3",
|
||
system_message="You are a helpful language and vision assistant. You are able to understand the visual content that the user provides, and assist the user with a variety of tasks using natural language.",
|
||
system_template="<|start_header_id|>system<|end_header_id|>\n\n{system_message}<|eot_id|>",
|
||
roles=("user", "assistant"),
|
||
sep_style=SeparatorStyle.LLAMA3,
|
||
sep="",
|
||
stop_str=["<|end_of_text|>", "<|eot_id|>"],
|
||
)
|
||
)
|
||
# Reference: https://github.com/InternLM/lmdeploy/blob/387bf54b4f124e72aab30ae9755f562e435d3d01/lmdeploy/model.py#L425-L442
|
||
register_conv_template(
|
||
Conversation(
|
||
name="internlm2-chat",
|
||
system_template="<|im_start|>system\n{system_message}",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep="\n",
|
||
stop_str=["<|im_end|>", "<|action_end|>"],
|
||
)
|
||
)
|
||
|
||
# Reference: https://huggingface.co/docs/transformers/main/model_doc/qwen2_vl#usage-example
|
||
register_conv_template(
|
||
Conversation(
|
||
name="qwen2-vl",
|
||
system_message="You are a helpful assistant.",
|
||
system_template="<|im_start|>system\n{system_message}",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep="<|im_end|>\n",
|
||
sep_style=SeparatorStyle.ADD_NEW_LINE_SINGLE,
|
||
stop_str=["<|im_end|>"],
|
||
image_token="<|vision_start|><|image_pad|><|vision_end|>",
|
||
)
|
||
)
|
||
|
||
register_conv_template(
|
||
Conversation(
|
||
name="deepseek-vl2",
|
||
system_template="{system_message}",
|
||
# system_message="You are a helpful assistant. Please answer truthfully and write out your "
|
||
# "thinking step by step to be sure you get the right answer.",
|
||
system_message="",
|
||
roles=("<|User|>", "<|Assistant|>"),
|
||
messages=(),
|
||
offset=0,
|
||
sep_style=SeparatorStyle.DeepSeekVL2,
|
||
sep="\n\n",
|
||
sep2="<｜end▁of▁sentence｜>",
|
||
stop_str=["User:", "<｜end▁of▁sentence｜>"],
|
||
)
|
||
)
|
||
|
||
# Reference: https://huggingface.co/google/gemma-3-4b-it/blob/main/config.json
|
||
register_conv_template(
|
||
Conversation(
|
||
name="gemma-it",
|
||
system_message="You are a helpful assistant.",
|
||
system_template="<start_of_turn>user{system_message}\n\n",
|
||
roles=("<start_of_turn>user\n", "<start_of_turn>model\n"),
|
||
sep="<end_of_turn>\n",
|
||
sep_style=SeparatorStyle.GEMMA3,
|
||
stop_str=["<end_of_turn>"],
|
||
image_token="<start_of_image>",
|
||
)
|
||
)
|
||
|
||
# Reference: https://huggingface.co/Alibaba-NLP/gme-Qwen2-VL-2B-Instruct#usage
|
||
register_conv_template(
|
||
Conversation(
|
||
name="gme-qwen2-vl",
|
||
system_message="You are a helpful assistant.",
|
||
system_template="<|im_start|>system\n{system_message}",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep="<|im_end|>\n",
|
||
sep_style=SeparatorStyle.QWEN2_VL_EMBED,
|
||
stop_str="<|endoftext|>",
|
||
image_token="<|vision_start|><|image_pad|><|vision_end|>",
|
||
)
|
||
)
|
||
|
||
# Reference: https://huggingface.co/openbmb/MiniCPM-V-2_6#usage
|
||
register_conv_template(
|
||
Conversation(
|
||
name="minicpmv",
|
||
system_message="You are a helpful assistant",
|
||
system_template="<|im_start|>system\n{system_message}.",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep="<|im_end|>\n",
|
||
sep_style=SeparatorStyle.ADD_NEW_LINE_SINGLE,
|
||
stop_str=("<|im_end|>", "<|endoftext|>"),
|
||
image_token="(<image>./</image>)",
|
||
)
|
||
)
|
||
|
||
# Reference: https://github.com/deepseek-ai/Janus?tab=readme-ov-file#janus-pro
|
||
register_conv_template(
|
||
Conversation(
|
||
name="janus-pro",
|
||
system_message="You are a helpful language and vision assistant. You are able to understand the visual content that the user provides, and assist the user with a variety of tasks using natural language",
|
||
system_template="{system_message}.",
|
||
roles=("User", "Assistant"),
|
||
sep="\n\n",
|
||
sep2="<｜end▁of▁sentence｜>",
|
||
sep_style=SeparatorStyle.ADD_COLON_TWO,
|
||
stop_str=["<|User|>", "<｜end▁of▁sentence｜>"],
|
||
image_token="<image_placeholder>",
|
||
)
|
||
)
|
||
|
||
# Reference: https://huggingface.co/openbmb/MiniCPM-o-2_6#usage
|
||
register_conv_template(
|
||
Conversation(
|
||
name="minicpmo",
|
||
system_message="You are Qwen, created by Alibaba Cloud. You are a helpful assistant.",
|
||
system_template="<|im_start|>system\n{system_message}",
|
||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||
sep="<|im_end|>\n",
|
||
sep_style=SeparatorStyle.ADD_NEW_LINE_SINGLE,
|
||
stop_str=("<|im_end|>", "<|endoftext|>"),
|
||
image_token="(<image>./</image>)",
|
||
audio_token="(<audio>./</audio>)",
|
||
)
|
||
)
|