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on
Zero
Running
on
Zero
File size: 1,476 Bytes
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import logging
from typing import Any
from langchain.callbacks import StdOutCallbackHandler
logging.addLevelName(15, "LangChain")
class LoggingCallbackHandler(StdOutCallbackHandler):
"""Callback Handler that prints to std out."""
always_verbose = True
def __init__(self, name: str) -> None:
"""Initialize callback handler."""
super().__init__()
self.logger = logging.getLogger(name)
self.prompt = ""
def on_chain_start(self, *args: Any, **kwargs: Any) -> None:
pass
def on_chain_end(self, *args: Any, **kwargs: Any) -> None:
pass
def on_agent_action(self, *args: Any, **kwargs: Any) -> Any:
pass
def on_tool_end(
self,
*args: Any,
**kwargs: Any,
) -> None:
pass
def on_tool_error(
self, error: BaseException | KeyboardInterrupt, **kwargs: Any
) -> None:
"""Do nothing."""
pass
def on_text(
self,
text: str,
color: str | None = None,
end: str = "",
**kwargs: Any,
) -> None:
"""Run when agent ends."""
# leave only prompt for environment
text = text.replace("\x1b[32;1m\x1b[1;3mHuman: ", "")
logging.log(15, f"LLM Call: {text}")
self.prompt = text
def retrive_prompt(self) -> str:
return self.prompt
def on_agent_finish(self, *args: Any, **kwargs: Any) -> None:
"""Run on agent end."""
pass
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