langchain/libs/partners/postgres/langchain_postgres/__init__.py

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from importlib import metadata
from langchain_postgres.chat_message_histories import PostgresChatMessageHistory
try:
__version__ = metadata.version(__package__)
except metadata.PackageNotFoundError:
# Case where package metadata is not available.
__version__ = ""
__all__ = [
"__version__",
"PostgresChatMessageHistory",
]