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langchain-python/langchain/utilities/asyncio.py
T
Zach Jones 13d1df2140 Feature: AgentExecutor execution time limit (#2399)
`AgentExecutor` already has support for limiting the number of
iterations. But the amount of time taken for each iteration can vary
quite a bit, so it is difficult to place limits on the execution time.
This PR adds a new field `max_execution_time` to the `AgentExecutor`
model. When called asynchronously, the agent loop is wrapped in an
`asyncio.timeout()` context which triggers the early stopping response
if the time limit is reached. When called synchronously, the agent loop
checks for both the max_iteration limit and the time limit after each
iteration.

When used asynchronously `max_execution_time` gives really tight control
over the max time for an execution chain. When used synchronously, the
chain can unfortunately exceed max_execution_time, but it still gives
more control than trying to estimate the number of max_iterations needed
to cap the execution time.

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Co-authored-by: Zachary Jones <zjones@zetaglobal.com>
2023-04-06 12:54:32 -07:00

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Python

"""Shims for asyncio features that may be missing from older python versions"""
import sys
if sys.version_info[:2] < (3, 11):
from async_timeout import timeout as asyncio_timeout
else:
from asyncio import timeout as asyncio_timeout
__all__ = ["asyncio_timeout"]