Support v1/chat/completions (#50)
This commit is contained in:
Cody Yu
381
python/sglang/srt/conversation.py
Normal file
381
python/sglang/srt/conversation.py
Normal file
@@ -0,0 +1,381 @@
|
||||
# Adapted from
|
||||
# https://github.com/lm-sys/FastChat/blob/main/fastchat/conversation.py
|
||||
from sglang.srt.managers.openai_protocol import ChatCompletionRequest
|
||||
from enum import IntEnum, auto
|
||||
import dataclasses
|
||||
from typing import Dict, List, Tuple, Union
|
||||
|
||||
|
||||
class SeparatorStyle(IntEnum):
|
||||
"""Separator styles."""
|
||||
|
||||
ADD_COLON_SINGLE = auto()
|
||||
ADD_COLON_TWO = auto()
|
||||
ADD_COLON_SPACE_SINGLE = auto()
|
||||
NO_COLON_SINGLE = auto()
|
||||
NO_COLON_TWO = auto()
|
||||
ADD_NEW_LINE_SINGLE = auto()
|
||||
LLAMA2 = auto()
|
||||
CHATGLM = auto()
|
||||
CHATML = auto()
|
||||
CHATINTERN = auto()
|
||||
DOLLY = auto()
|
||||
RWKV = auto()
|
||||
PHOENIX = auto()
|
||||
ROBIN = auto()
|
||||
FALCON_CHAT = auto()
|
||||
CHATGLM3 = auto()
|
||||
DEEPSEEK_CHAT = auto()
|
||||
METAMATH = auto()
|
||||
|
||||
|
||||
@dataclasses.dataclass
|
||||
class Conversation:
|
||||
"""A class that manages prompt templates and keeps all conversation history."""
|
||||
|
||||
# The name of this template
|
||||
name: str
|
||||
# The template of the system prompt
|
||||
system_template: str = "{system_message}"
|
||||
# The system message
|
||||
system_message: str = ""
|
||||
# The names of two roles
|
||||
roles: Tuple[str] = ("USER", "ASSISTANT")
|
||||
# All messages. Each item is (role, message).
|
||||
messages: List[List[str]] = ()
|
||||
# The number of few shot examples
|
||||
offset: int = 0
|
||||
# The separator style and configurations
|
||||
sep_style: SeparatorStyle = SeparatorStyle.ADD_COLON_SINGLE
|
||||
sep: str = "\n"
|
||||
sep2: str = None
|
||||
# Stop criteria (the default one is EOS token)
|
||||
stop_str: Union[str, List[str]] = None
|
||||
|
||||
def get_prompt(self) -> str:
|
||||
"""Get the prompt for generation."""
|
||||
system_prompt = self.system_template.format(system_message=self.system_message)
|
||||
if self.sep_style == SeparatorStyle.ADD_COLON_SINGLE:
|
||||
ret = system_prompt + self.sep
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + ": " + message + self.sep
|
||||
else:
|
||||
ret += role + ":"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.ADD_COLON_TWO:
|
||||
seps = [self.sep, self.sep2]
|
||||
ret = system_prompt + seps[0]
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if message:
|
||||
ret += role + ": " + message + seps[i % 2]
|
||||
else:
|
||||
ret += role + ":"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.ADD_COLON_SPACE_SINGLE:
|
||||
ret = system_prompt + self.sep
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + ": " + message + self.sep
|
||||
else:
|
||||
ret += role + ": " # must be end with a space
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.ADD_NEW_LINE_SINGLE:
|
||||
ret = "" if system_prompt == "" else system_prompt + self.sep
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + "\n" + message + self.sep
|
||||
else:
|
||||
ret += role + "\n"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.NO_COLON_SINGLE:
|
||||
ret = system_prompt
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + message + self.sep
|
||||
else:
|
||||
ret += role
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.NO_COLON_TWO:
|
||||
seps = [self.sep, self.sep2]
|
||||
ret = system_prompt
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if message:
|
||||
ret += role + message + seps[i % 2]
|
||||
else:
|
||||
ret += role
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.RWKV:
|
||||
ret = system_prompt
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if message:
|
||||
ret += role + ": " + message.replace("\r\n", "\n").replace("\n\n", "\n")
|
||||
ret += "\n\n"
|
||||
else:
|
||||
ret += role + ":"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.LLAMA2:
|
||||
seps = [self.sep, self.sep2]
|
||||
if self.system_message:
|
||||
ret = system_prompt
|
||||
else:
|
||||
ret = "[INST] "
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
tag = self.roles[i % 2]
|
||||
if message:
|
||||
if i == 0:
|
||||
ret += message + " "
|
||||
else:
|
||||
ret += tag + " " + message + seps[i % 2]
|
||||
else:
|
||||
ret += tag
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.CHATGLM:
|
||||
# source: https://huggingface.co/THUDM/chatglm-6b/blob/1d240ba371910e9282298d4592532d7f0f3e9f3e/modeling_chatglm.py#L1302-L1308
|
||||
# source2: https://huggingface.co/THUDM/chatglm2-6b/blob/e186c891cf64310ac66ef10a87e6635fa6c2a579/modeling_chatglm.py#L926
|
||||
round_add_n = 1 if self.name == "chatglm2" else 0
|
||||
if system_prompt:
|
||||
ret = system_prompt + self.sep
|
||||
else:
|
||||
ret = ""
|
||||
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if i % 2 == 0:
|
||||
ret += f"[Round {i//2 + round_add_n}]{self.sep}"
|
||||
|
||||
if message:
|
||||
ret += f"{role}：{message}{self.sep}"
|
||||
else:
|
||||
ret += f"{role}："
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.CHATML:
|
||||
ret = "" if system_prompt == "" else system_prompt + self.sep + "\n"
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + "\n" + message + self.sep + "\n"
|
||||
else:
|
||||
ret += role + "\n"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.CHATGLM3:
|
||||
ret = ""
|
||||
if self.system_message:
|
||||
ret += system_prompt
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + "\n" + message
|
||||
else:
|
||||
ret += role
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.CHATINTERN:
|
||||
# source: https://huggingface.co/internlm/internlm-chat-7b-8k/blob/bd546fa984b4b0b86958f56bf37f94aa75ab8831/modeling_internlm.py#L771
|
||||
seps = [self.sep, self.sep2]
|
||||
ret = system_prompt
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if i % 2 == 0:
|
||||
ret += "<s>"
|
||||
if message:
|
||||
ret += role + ":" + message + seps[i % 2] + "\n"
|
||||
else:
|
||||
ret += role + ":"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.DOLLY:
|
||||
seps = [self.sep, self.sep2]
|
||||
ret = system_prompt
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if message:
|
||||
ret += role + ":\n" + message + seps[i % 2]
|
||||
if i % 2 == 1:
|
||||
ret += "\n\n"
|
||||
else:
|
||||
ret += role + ":\n"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.PHOENIX:
|
||||
ret = system_prompt
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + ": " + "<s>" + message + "</s>"
|
||||
else:
|
||||
ret += role + ": " + "<s>"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.ROBIN:
|
||||
ret = system_prompt + self.sep
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + ":\n" + message + self.sep
|
||||
else:
|
||||
ret += role + ":\n"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.FALCON_CHAT:
|
||||
ret = ""
|
||||
if self.system_message:
|
||||
ret += system_prompt + self.sep
|
||||
for role, message in self.messages:
|
||||
if message:
|
||||
ret += role + ": " + message + self.sep
|
||||
else:
|
||||
ret += role + ":"
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.METAMATH:
|
||||
ret = "" if system_prompt == "" else system_prompt + self.sep
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
# For MetaMath, sep2 is used to prefix the message.
|
||||
starting_sep = ":\n" if i % 2 == 0 else ": " + self.sep2
|
||||
ending_sep = self.sep if i % 2 == 0 else ""
|
||||
if message:
|
||||
ret += role + starting_sep + message + ending_sep
|
||||
else:
|
||||
ret += role + starting_sep
|
||||
return ret
|
||||
elif self.sep_style == SeparatorStyle.DEEPSEEK_CHAT:
|
||||
seps = [self.sep, self.sep2]
|
||||
ret = system_prompt
|
||||
for i, (role, message) in enumerate(self.messages):
|
||||
if message:
|
||||
ret += role + ": " + message + seps[i % 2]
|
||||
else:
|
||||
ret += role + ":"
|
||||
return ret
|
||||
else:
|
||||
raise ValueError(f"Invalid style: {self.sep_style}")
|
||||
|
||||
def set_system_message(self, system_message: str):
|
||||
"""Set the system message."""
|
||||
self.system_message = system_message
|
||||
|
||||
def append_message(self, role: str, message: str):
|
||||
"""Append a new message."""
|
||||
self.messages.append([role, message])
|
||||
|
||||
def update_last_message(self, message: str):
|
||||
"""Update the last output.
|
||||
|
||||
The last message is typically set to be None when constructing the prompt,
|
||||
so we need to update it in-place after getting the response from a model.
|
||||
"""
|
||||
self.messages[-1][1] = message
|
||||
|
||||
def to_gradio_chatbot(self):
|
||||
"""Convert the conversation to gradio chatbot format."""
|
||||
ret = []
|
||||
for i, (role, msg) in enumerate(self.messages[self.offset :]):
|
||||
if i % 2 == 0:
|
||||
ret.append([msg, None])
|
||||
else:
|
||||
ret[-1][-1] = msg
|
||||
return ret
|
||||
|
||||
def to_openai_api_messages(self):
|
||||
"""Convert the conversation to OpenAI chat completion format."""
|
||||
if self.system_message == "":
|
||||
ret = []
|
||||
else:
|
||||
ret = [{"role": "system", "content": self.system_message}]
|
||||
|
||||
for i, (_, msg) in enumerate(self.messages[self.offset :]):
|
||||
if i % 2 == 0:
|
||||
ret.append({"role": "user", "content": msg})
|
||||
else:
|
||||
if msg is not None:
|
||||
ret.append({"role": "assistant", "content": msg})
|
||||
return ret
|
||||
|
||||
def copy(self):
|
||||
return Conversation(
|
||||
name=self.name,
|
||||
system_template=self.system_template,
|
||||
system_message=self.system_message,
|
||||
roles=self.roles,
|
||||
messages=[[x, y] for x, y in self.messages],
|
||||
offset=self.offset,
|
||||
sep_style=self.sep_style,
|
||||
sep=self.sep,
|
||||
sep2=self.sep2,
|
||||
stop_str=self.stop_str,
|
||||
)
|
||||
|
||||
def dict(self):
|
||||
return {
|
||||
"template_name": self.name,
|
||||
"system_message": self.system_message,
|
||||
"roles": self.roles,
|
||||
"messages": self.messages,
|
||||
"offset": self.offset,
|
||||
}
|
||||
|
||||
|
||||
# A global registry for all conversation templates
|
||||
chat_templates: Dict[str, Conversation] = {}
|
||||
|
||||
|
||||
def register_conv_template(template: Conversation, override: bool = False):
|
||||
"""Register a new conversation template."""
|
||||
if not override:
|
||||
assert template.name not in chat_templates, f"{template.name} has been registered."
|
||||
|
||||
chat_templates[template.name] = template
|
||||
|
||||
|
||||
def chat_template_exists(template_name: str) -> bool:
|
||||
return template_name in chat_templates
|
||||
|
||||
|
||||
def generate_chat_conv(request: ChatCompletionRequest, template_name: str) -> Conversation:
|
||||
conv = chat_templates[template_name].copy()
|
||||
conv = Conversation(
|
||||
name=conv.name,
|
||||
system_template=conv.system_template,
|
||||
system_message=conv.system_message,
|
||||
roles=conv.roles,
|
||||
messages=list(conv.messages), # prevent in-place modification
|
||||
offset=conv.offset,
|
||||
sep_style=SeparatorStyle(conv.sep_style),
|
||||
sep=conv.sep,
|
||||
sep2=conv.sep2,
|
||||
stop_str=conv.stop_str,
|
||||
)
|
||||
|
||||
if isinstance(request.messages, str):
|
||||
raise ValueError("The messages should be a list of dict.")
|
||||
for message in request.messages:
|
||||
msg_role = message["role"]
|
||||
if msg_role == "system":
|
||||
conv.system_message = message["content"]
|
||||
elif msg_role == "user":
|
||||
conv.append_message(conv.roles[0], message["content"])
|
||||
elif msg_role == "assistant":
|
||||
conv.append_message(conv.roles[1], message["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 an AI assistant.",
|
||||
roles=("<|im_start|>user", "<|im_start|>assistant"),
|
||||
sep_style=SeparatorStyle.CHATML,
|
||||
sep="<|im_end|>",
|
||||
stop_str=["<|endoftext|>", "<|im_end|>"],
|
||||
)
|
||||
)
|
||||
Reference in New Issue
Block a user