get_function_first_arg_dict_keys#

langchain_core.runnables.utils.get_function_first_arg_dict_keys(func: Callable) list[str] | None[source]#

Get the keys of the first argument of a function if it is a dict.

Parameters:

func (Callable) – The function to check.

Returns:

The keys of the first argument if it is a dict,

None otherwise.

Return type:

Optional[List[str]]