286 lines
10 KiB
Python
286 lines
10 KiB
Python
from dataclasses import dataclass, field, is_dataclass
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from typing import Type, TypedDict, Literal, Dict, List, Tuple, Any
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import tyro
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from pydantic import BaseModel, Field
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from loguru import logger
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from PIL import Image
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from io import BytesIO
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import matplotlib.pyplot as plt
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import jax
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import os.path as osp
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import commentjson
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import glob
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from lang_agent.config import KeyConfig
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from lang_agent.tool_manager import ToolManager, ToolManagerConfig
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from lang_agent.base import GraphBase
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from lang_agent.graphs.graph_state import State
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from lang_agent.graphs.tool_nodes import AnnotatedToolNode, ToolNode
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from langchain.chat_models import init_chat_model
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from langchain_core.messages import SystemMessage, HumanMessage, BaseMessage
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from langchain_core.messages.base import BaseMessageChunk
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from langchain.agents import create_agent
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from langgraph.graph import StateGraph, START, END
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from langgraph.checkpoint.memory import MemorySaver
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@tyro.conf.configure(tyro.conf.SuppressFixed)
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@dataclass
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class RoutingConfig(KeyConfig):
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_target: Type = field(default_factory=lambda: RoutingGraph)
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llm_name: str = "qwen-plus"
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"""name of llm"""
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llm_provider:str = "openai"
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"""provider of the llm"""
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base_url:str = "https://dashscope.aliyuncs.com/compatible-mode/v1"
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"""base url; could be used to overwrite the baseurl in llm provider"""
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sys_promp_json: str = None
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"path to json contantaining system prompt for graphs; Will overwrite systemprompt from xiaozhi if 'chat_prompt' is provided"
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tool_manager_config: ToolManagerConfig = field(default_factory=ToolManagerConfig)
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def __post_init__(self):
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super().__post_init__()
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if self.sys_promp_json is None:
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# self.sys_promp_json = osp.join(osp.dirname(osp.dirname(osp.dirname(__file__))), "configs", "route_sys_prompts.json")
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self.sys_promp_json = osp.join(osp.dirname(osp.dirname(osp.dirname(__file__))), "configs", "route_sys_prompts")
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logger.warning(f"config_f was not provided. Using default: {self.sys_promp_json}")
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assert osp.exists(self.sys_promp_json), f"config_f {self.sys_promp_json} does not exist."
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class Route(BaseModel):
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step: Literal["chat", "order"] = Field(
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None, description="The next step in the routing process"
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)
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class RoutingGraph(GraphBase):
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def __init__(self, config: RoutingConfig):
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self.config = config
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# NOTE: tool that the chatbranch should have
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self.chat_tool_names = ["retrieve",
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"get_resources"]
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self._build_modules()
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self.workflow = self._build_graph()
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def _stream_result(self, *nargs, **kwargs):
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for chunk, metadata in self.workflow.stream({"inp": nargs}, stream_mode="messages", **kwargs):
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node = metadata.get("langgraph_node")
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if node != "model":
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continue # skip router or other intermediate nodes
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# Yield only the final message content chunks
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if isinstance(chunk, (BaseMessageChunk, BaseMessage)) and getattr(chunk, "content", None):
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yield chunk.content
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def invoke(self, *nargs, as_stream:bool=False, as_raw:bool=False, **kwargs):
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self._validate_input(*nargs, **kwargs)
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if as_stream:
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# Stream messages from the workflow
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return self._stream_result(*nargs, **kwargs)
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else:
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state = self.workflow.invoke({"inp": nargs})
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msg_list = jax.tree.leaves(state)
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for e in msg_list:
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if isinstance(e, BaseMessage):
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e.pretty_print()
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if as_raw:
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return msg_list
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return msg_list[-1].content
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def _validate_input(self, *nargs, **kwargs):
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print("\033[93m====================INPUT HUMAN MESSAGES=============================\033[0m")
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for e in nargs[0]["messages"]:
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if isinstance(e, HumanMessage):
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e.pretty_print()
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print("\033[93m====================END INPUT HUMAN MESSAGES=============================\033[0m")
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print(f"\033[93 model used: {self.config.llm_name}\033[0m")
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assert len(nargs[0]["messages"]) >= 2, "need at least 1 system and 1 human message"
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assert len(kwargs) == 0, "due to inp assumptions"
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def _get_chat_tools(self, man:ToolManager):
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return [lang_tool for lang_tool in man.get_list_langchain_tools() if lang_tool.name in self.chat_tool_names]
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def _build_modules(self):
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self.llm = init_chat_model(model=self.config.llm_name,
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model_provider=self.config.llm_provider,
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api_key=self.config.api_key,
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base_url=self.config.base_url,
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temperature=0)
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self.fast_llm = init_chat_model(model='qwen-flash',
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model_provider='openai',
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api_key=self.config.api_key,
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base_url=self.config.base_url,
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temperature=0)
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self.memory = MemorySaver() # shared memory between the two branch
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self.router = self.fast_llm.with_structured_output(Route)
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tool_manager:ToolManager = self.config.tool_manager_config.setup()
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self.chat_model = create_agent(self.llm, self._get_chat_tools(tool_manager), checkpointer=self.memory)
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self.tool_model = create_agent(self.llm, tool_manager.get_list_langchain_tools(), checkpointer=self.memory)
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self._load_sys_prompts()
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def _load_sys_prompts(self):
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if "json" in self.config.sys_promp_json[-5:]:
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logger.info("loading sys prompt from json")
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with open(self.config.sys_promp_json , "r") as f:
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self.prompt_dict:Dict[str, str] = commentjson.load(f)
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elif osp.isdir(self.config.sys_promp_json):
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logger.info("loading sys_prompt from txt")
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sys_fs = glob.glob(osp.join(self.config.sys_promp_json, "*.txt"))
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sys_fs = sorted([e for e in sys_fs if not ("optional" in e)])
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assert len(sys_fs) <= 3, "AT MOST 3 PROMPT!"
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self.prompt_dict = {}
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for sys_f in sys_fs:
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key = osp.basename(sys_f).split(".")[0]
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with open(sys_f, "r") as f:
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self.prompt_dict[key] = f.read()
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else:
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err_msg = f"{self.config.sys_promp_json} is not supported"
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assert 0, err_msg
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for k, _ in self.prompt_dict.items():
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logger.info(f"loaded {k} system prompt")
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def _router_call(self, state:State):
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decision:Route = self.router.invoke(
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[
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SystemMessage(
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content=self.prompt_dict["route_prompt"]
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),
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self._get_human_msg(state)
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]
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)
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return {"decision": decision.step}
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def _get_human_msg(self, state: State)->HumanMessage:
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"""
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get user message of current invocation
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"""
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msgs = state["inp"][0]["messages"]
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candidate_hum_msg = msgs[1]
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assert isinstance(candidate_hum_msg, HumanMessage), "not a human message"
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return candidate_hum_msg
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def _route_decision(self, state:State):
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logger.info(f"decision:{state['decision']}")
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if state["decision"] == "chat":
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return "chat"
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else:
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return "tool"
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def _chat_model_call(self, state:State):
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if state.get("messages") is not None:
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inp = state["messages"], state["inp"][1]
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else:
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inp = state["inp"]
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if self.prompt_dict.get("chat_prompt") is not None:
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inp = {"messages":[
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SystemMessage(
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self.prompt_dict["chat_prompt"]
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),
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*state["inp"][0]["messages"][1:]
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]}, state["inp"][1]
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out = self.chat_model.invoke(*inp)
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return {"messages": out}
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def _tool_model_call(self, state:State):
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inp = {"messages":[
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SystemMessage(
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self.prompt_dict["tool_prompt"]
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),
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*state["inp"][0]["messages"][1:]
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]}, state["inp"][1]
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out = self.tool_model.invoke(*inp)
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return {"messages": out}
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def _build_graph(self):
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builder = StateGraph(State)
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# add nodes
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builder.add_node("chat_model_call", self._chat_model_call)
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builder.add_node("tool_model_call", self._tool_model_call)
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builder.add_node("router_call", self._router_call)
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# add edge connections
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builder.add_edge(START, "router_call")
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builder.add_conditional_edges(
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"router_call",
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self._route_decision,
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{
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"chat": "chat_model_call",
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"tool": "tool_model_call"
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}
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)
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builder.add_edge("tool_model_call", END)
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# builder.add_edge("tool_model_call", "chat_model_call")
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builder.add_edge("chat_model_call", END)
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workflow = builder.compile()
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return workflow
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def show_graph(self):
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logger.info("creating image")
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img = Image.open(BytesIO(self.workflow.get_graph().draw_mermaid_png()))
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plt.imshow(img)
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plt.show()
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if __name__ == "__main__":
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from dotenv import load_dotenv
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from langchain.messages import SystemMessage, HumanMessage
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from langchain_core.messages.base import BaseMessageChunk
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load_dotenv()
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route:RoutingGraph = RoutingConfig().setup()
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graph = route.workflow
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nargs = {
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"messages": [SystemMessage("you are a helpful bot named jarvis"),
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HumanMessage("what is your name")]
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},{"configurable": {"thread_id": "3"}}
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for chunk, metadata in graph.stream({"inp": nargs}, stream_mode="messages"):
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node = metadata.get("langgraph_node")
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if node not in ("model"):
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continue # skip router or other intermediate nodes
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# Print only the final message content
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if isinstance(chunk, (BaseMessageChunk, BaseMessage)) and getattr(chunk, "content", None):
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print(chunk.content, end="", flush=True)
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