65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
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import sys
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from typing import Any
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from warnings import warn
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from langgraph._internal._constants import (
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CONF,
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CONFIG_KEY_CHECKPOINTER,
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TASKS,
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)
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from langgraph.warnings import LangGraphDeprecatedSinceV10
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__all__ = (
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"TAG_NOSTREAM",
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"TAG_HIDDEN",
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"START",
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"END",
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# retained for backwards compatibility (mostly langgraph-api), should be removed in v2 (or earlier)
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"CONF",
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"TASKS",
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"CONFIG_KEY_CHECKPOINTER",
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)
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# --- Public constants ---
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TAG_NOSTREAM = sys.intern("nostream")
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"""Tag to disable streaming for a chat model."""
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TAG_HIDDEN = sys.intern("langsmith:hidden")
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"""Tag to hide a node/edge from certain tracing/streaming environments."""
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END = sys.intern("__end__")
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"""The last (maybe virtual) node in graph-style Pregel."""
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START = sys.intern("__start__")
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"""The first (maybe virtual) node in graph-style Pregel."""
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def __getattr__(name: str) -> Any:
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if name in ["Send", "Interrupt"]:
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warn(
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f"Importing {name} from langgraph.constants is deprecated. "
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f"Please use 'from langgraph.types import {name}' instead.",
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LangGraphDeprecatedSinceV10,
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stacklevel=2,
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)
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from importlib import import_module
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module = import_module("langgraph.types")
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return getattr(module, name)
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try:
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from importlib import import_module
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private_constants = import_module("langgraph._internal._constants")
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attr = getattr(private_constants, name)
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warn(
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f"Importing {name} from langgraph.constants is deprecated. "
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f"This constant is now private and should not be used directly. "
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"Please let the LangGraph team know if you need this value.",
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LangGraphDeprecatedSinceV10,
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stacklevel=2,
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)
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return attr
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except AttributeError:
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pass
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raise AttributeError(f"module has no attribute '{name}'")
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