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core[runnables]: docstring for class RunnableSerializable, method configurable_fields (#19722)

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**Description:** Update to the docstring for class RunnableSerializable,
method configurable_fields
**Issue:** [Add in code documentation to core Runnable methods
#18804](https://github.com/langchain-ai/langchain/issues/18804)
**Dependencies:** None

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>
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aditya thomas 2024-03-29 03:45:18 +05:30 committed by GitHub
parent e1f10a697e
commit 263ee78886
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27
libs/core/langchain_core/runnables/base.py
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@ -2034,6 +2034,33 @@ class RunnableSerializable(Serializable, Runnable[Input, Output]):
def configurable_fields(
self, **kwargs: AnyConfigurableField
) -> RunnableSerializable[Input, Output]:
"""Configure particular runnable fields at runtime.
.. code-block:: python
from langchain_core.runnables import ConfigurableField
from langchain_openai import ChatOpenAI
model = ChatOpenAI(max_tokens=20).configurable_fields(
max_tokens=ConfigurableField(
id="output_token_number",
name="Max tokens in the output",
description="The maximum number of tokens in the output",
)
)
# max_tokens = 20
print(
"max_tokens_20: ",
model.invoke("tell me something about chess").content
)
# max_tokens = 200
print("max_tokens_200: ", model.with_config(
configurable={"output_token_number": 200}
).invoke("tell me something about chess").content
)
"""
from langchain_core.runnables.configurable import RunnableConfigurableFields
for key in kwargs: