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core: fix .bind when used with RunnableLambda async methods #17739
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Would appreciate a thorough review of this one as although tests pass, I don't have a good intuition as to whether it introduces new bugs. |
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looks right to me, great catch @ccurme!
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…n-ai#17739) **Description:** Here is a minimal example to illustrate behavior: ```python from langchain_core.runnables import RunnableLambda def my_function(*args, **kwargs): return 3 + kwargs.get("n", 0) runnable = RunnableLambda(my_function).bind(n=1) assert 4 == runnable.invoke({}) assert [4] == list(runnable.stream({})) assert 4 == await runnable.ainvoke({}) assert [4] == [item async for item in runnable.astream({})] ``` Here, `runnable.invoke({})` and `runnable.stream({})` work fine, but `runnable.ainvoke({})` raises ``` TypeError: RunnableLambda._ainvoke.<locals>.func() got an unexpected keyword argument 'n' ``` and similarly for `runnable.astream({})`: ``` TypeError: RunnableLambda._atransform.<locals>.func() got an unexpected keyword argument 'n' ``` Here we assume that this behavior is undesired and attempt to fix it. **Issue:** langchain-ai#17241, langchain-ai#16446
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…n-ai#17739) **Description:** Here is a minimal example to illustrate behavior: ```python from langchain_core.runnables import RunnableLambda def my_function(*args, **kwargs): return 3 + kwargs.get("n", 0) runnable = RunnableLambda(my_function).bind(n=1) assert 4 == runnable.invoke({}) assert [4] == list(runnable.stream({})) assert 4 == await runnable.ainvoke({}) assert [4] == [item async for item in runnable.astream({})] ``` Here, `runnable.invoke({})` and `runnable.stream({})` work fine, but `runnable.ainvoke({})` raises ``` TypeError: RunnableLambda._ainvoke.<locals>.func() got an unexpected keyword argument 'n' ``` and similarly for `runnable.astream({})`: ``` TypeError: RunnableLambda._atransform.<locals>.func() got an unexpected keyword argument 'n' ``` Here we assume that this behavior is undesired and attempt to fix it. **Issue:** langchain-ai#17241, langchain-ai#16446
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…n-ai#17739) **Description:** Here is a minimal example to illustrate behavior: ```python from langchain_core.runnables import RunnableLambda def my_function(*args, **kwargs): return 3 + kwargs.get("n", 0) runnable = RunnableLambda(my_function).bind(n=1) assert 4 == runnable.invoke({}) assert [4] == list(runnable.stream({})) assert 4 == await runnable.ainvoke({}) assert [4] == [item async for item in runnable.astream({})] ``` Here, `runnable.invoke({})` and `runnable.stream({})` work fine, but `runnable.ainvoke({})` raises ``` TypeError: RunnableLambda._ainvoke.<locals>.func() got an unexpected keyword argument 'n' ``` and similarly for `runnable.astream({})`: ``` TypeError: RunnableLambda._atransform.<locals>.func() got an unexpected keyword argument 'n' ``` Here we assume that this behavior is undesired and attempt to fix it. **Issue:** langchain-ai#17241, langchain-ai#16446
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Description: Here is a minimal example to illustrate behavior:
Here,
runnable.invoke({})
andrunnable.stream({})
work fine, butrunnable.ainvoke({})
raisesand similarly for
runnable.astream({})
:Here we assume that this behavior is undesired and attempt to fix it.
Issue: #17241, #16446