A'h ddlmZmZddlmZddlmZmZmZddl m Z ddl m Z ddl mZmZedZedZed ZGd d eeeefeZgd Zy ))ABCabstractmethod)Sequence)AnyGenericTypeVar)Self)MISSING)EmptyChannelErrorInvalidUpdateErrorValueUpdateCceZdZdZdZddededdfdZee defdZ ee defd Z de fd Z defd Ze d ede fd Ze defdZdefdZe deedefdZdefdZdefdZy) BaseChannelzBase class for all channels.)keytyprrreturnNc ||_||_y)N)rr)selfrrs ^/home/kushmeetdev/Regenta/Chatbot/venv/lib/python3.12/site-packages/langgraph/channels/base.py__init__zBaseChannel.__init__scy)z,The type of the value stored in the channel.Nrs r ValueTypezBaseChannel.ValueTypercy)z/The type of the update received by the channel.Nrrs r UpdateTypezBaseChannel.UpdateTyperrc@|j|jS)zReturn a copy of the channel. By default, delegates to checkpoint() and from_checkpoint(). Subclasses can override this method with a more efficient implementation.)from_checkpoint checkpointrs rcopyzBaseChannel.copy$s##DOO$566rcN |jS#t$r tcYSwxYw)zReturn a serializable representation of the channel's current state. Raises EmptyChannelError if the channel is empty (never updated yet), or doesn't support checkpoints.)getr r rs rr#zBaseChannel.checkpoint*s' 88:   N s $$r#cy)zReturn a new identical channel, optionally initialized from a checkpoint. If the checkpoint contains complex data structures, they should be copied.Nr)rr#s rr"zBaseChannel.from_checkpoint3rrcy)zwReturn the current value of the channel. Raises EmptyChannelError if the channel is empty (never updated yet).Nrrs rr&zBaseChannel.get:rrcD |jy#t$rYywxYw)zReturn True if the channel is available (not empty), False otherwise. Subclasses should override this method to provide a more efficient implementation than calling get() and catching EmptyChannelError. TF)r&r rs r is_availablezBaseChannel.is_available@s%   HHJ   s  valuescy)aUpdate the channel's value with the given sequence of updates. The order of the updates in the sequence is arbitrary. This method is called by Pregel for all channels at the end of each step. If there are no updates, it is called with an empty sequence. Raises InvalidUpdateError if the sequence of updates is invalid. Returns True if the channel was updated, False otherwise.Nr)rr+s rupdatezBaseChannel.updateMrrcy)aNotify the channel that a subscribed task ran. By default, no-op. A channel can use this method to modify its state, preventing the value from being consumed again. Returns True if the channel was updated, False otherwise. Frrs rconsumezBaseChannel.consumeVsrcy)zNotify the channel that the Pregel run is finishing. By default, no-op. A channel can use this method to modify its state, preventing finish. Returns True if the channel was updated, False otherwise. Frrs rfinishzBaseChannel.finish_s r))__name__ __module__ __qualname____doc__ __slots__rstrrpropertyrrr r r$rr#r"r r&boolr*rrr-r/r1rrrrrs&ICc4;3;;>C>> 7d7 AV!VVV QUQQ d EXf-E$EErr)rr r N)abcrrcollections.abcrtypingrrrtyping_extensionsr langgraph.constantsr langgraph.errorsr r r rrr__all__rrrrBs[#$(("'B   CLV'%*+SVr r