langchain_community.graphs.networkx_graph.NetworkxEntityGraph¶

class langchain_community.graphs.networkx_graph.NetworkxEntityGraph(graph: Optional[Any] = None)[source]¶

Networkx wrapper for entity graph operations.

Security note: Make sure that the database connection uses credentials

that are narrowly-scoped to only include necessary permissions. Failure to do so may result in data corruption or loss, since the calling code may attempt commands that would result in deletion, mutation of data if appropriately prompted or reading sensitive data if such data is present in the database. The best way to guard against such negative outcomes is to (as appropriate) limit the permissions granted to the credentials used with this tool.

See https://python.langchain.com/docs/security for more information.

Create a new graph.

Methods

__init__([graph])

Create a new graph.

add_node(node)

Add node in the graph.

add_triple(knowledge_triple)

Add a triple to the graph.

clear()

Clear the graph.

clear_edges()

Clear the graph edges.

delete_triple(knowledge_triple)

Delete a triple from the graph.

draw_graphviz(**kwargs)

Provides better drawing

from_gml(gml_path)

get_entity_knowledge(entity[, depth])

Get information about an entity.

get_neighbors(node)

Return the neighbor nodes of the given node.

get_number_of_nodes()

Get number of nodes in the graph.

get_topological_sort()

Get a list of entity names in the graph sorted by causal dependence.

get_triples()

Get all triples in the graph.

has_edge(source_node, destination_node)

Return if graph has an edge between the given nodes.

has_node(node)

Return if graph has the given node.

remove_edge(source_node, destination_node)

Remove edge from the graph.

remove_node(node)

Remove node from the graph.

write_to_gml(path)

Parameters

graph (Optional[Any]) –

__init__(graph: Optional[Any] = None) → None[source]¶

Create a new graph.

Parameters

graph (Optional[Any]) –

Return type

None

add_node(node: str) → None[source]¶

Add node in the graph.

Parameters

node (str) –

Return type

None

add_triple(knowledge_triple: KnowledgeTriple) → None[source]¶

Add a triple to the graph.

Parameters

knowledge_triple (KnowledgeTriple) –

Return type

None

clear() → None[source]¶

Clear the graph.

Return type

None

clear_edges() → None[source]¶

Clear the graph edges.

Return type

None

delete_triple(knowledge_triple: KnowledgeTriple) → None[source]¶

Delete a triple from the graph.

Parameters

knowledge_triple (KnowledgeTriple) –

Return type

None

draw_graphviz(**kwargs: Any) → None[source]¶

Provides better drawing

Usage in a jupyter notebook:

>>> from IPython.display import SVG
>>> self.draw_graphviz_svg(layout="dot", filename="web.svg")
>>> SVG('web.svg')
Parameters

kwargs (Any) –

Return type

None

classmethod from_gml(gml_path: str) → NetworkxEntityGraph[source]¶
Parameters

gml_path (str) –

Return type

NetworkxEntityGraph

get_entity_knowledge(entity: str, depth: int = 1) → List[str][source]¶

Get information about an entity.

Parameters

  • entity (str) –

  • depth (int) –

Return type

List[str]

get_neighbors(node: str) → List[str][source]¶

Return the neighbor nodes of the given node.

Parameters

node (str) –

Return type

List[str]

get_number_of_nodes() → int[source]¶

Get number of nodes in the graph.

Return type

int

get_topological_sort() → List[str][source]¶

Get a list of entity names in the graph sorted by causal dependence.

Return type

List[str]

get_triples() → List[Tuple[str, str, str]][source]¶

Get all triples in the graph.

Return type

List[Tuple[str, str, str]]

has_edge(source_node: str, destination_node: str) → bool[source]¶

Return if graph has an edge between the given nodes.

Parameters

  • source_node (str) –

  • destination_node (str) –

Return type

bool

has_node(node: str) → bool[source]¶

Return if graph has the given node.

Parameters

node (str) –

Return type

bool

remove_edge(source_node: str, destination_node: str) → None[source]¶

Remove edge from the graph.

Parameters

  • source_node (str) –

  • destination_node (str) –

Return type

None

remove_node(node: str) → None[source]¶

Remove node from the graph.

Parameters

node (str) –

Return type

None

write_to_gml(path: str) → None[source]¶
Parameters

path (str) –

Return type

None

Examples using NetworkxEntityGraph¶