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community : added support for pickle networkx graph import #27068

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community : added support for pickle networkx graph import #27068

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14 changes: 13 additions & 1 deletion libs/community/langchain_community/graphs/networkx_graph.py
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,19 @@ def from_gml(cls, gml_path: str) -> NetworkxEntityGraph:
)
graph = nx.read_gml(gml_path)
return cls(graph)


@classmethod
def from_pickle(cls, pickle_path: str) -> NetworkxEntityGraph:
try:
import pickle
except ImportError:
raise ImportError(
"Could not import pickle python package. "
"Please install it with `pip install pickle`."
)
graph = pickle.load(open(pickle_path, 'rb'))
return cls(graph)

def add_triple(self, knowledge_triple: KnowledgeTriple) -> None:
"""Add a triple to the graph."""
# Creates nodes if they don't exist
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