"""
Read and write NetworkX graphs as JavaScript InfoVis Toolkit (JIT) format JSON.
See the `JIT documentation`_ for more examples.
Format
------
var json = [
{
"id": "aUniqueIdentifier",
"name": "usually a nodes name",
"data": {
"some key": "some value",
"some other key": "some other value"
},
"adjacencies": [
{
nodeTo:"aNodeId",
data: {} //put whatever you want here
},
'other adjacencies go here...'
},
'other nodes go here...'
];
.. _JIT documentation: http://thejit.org
"""
import json
import warnings
import networkx as nx
from networkx.utils.decorators import not_implemented_for
__all__ = ["jit_graph", "jit_data"]
[文档]def jit_graph(data, create_using=None):
"""Read a graph from JIT JSON.
Parameters
----------
data : JSON Graph Object
create_using : Networkx Graph, optional (default: Graph())
Return graph of this type. The provided instance will be cleared.
Returns
-------
G : NetworkX Graph built from create_using if provided.
.. deprecated:: 2.6
"""
warnings.warn(
("jit_graph is deprecated and will be removed in NetworkX 3.0."),
DeprecationWarning,
)
if create_using is None:
G = nx.Graph()
else:
G = create_using
G.clear()
if isinstance(data, str):
data = json.loads(data)
for node in data:
G.add_node(node["id"], **node["data"])
if node.get("adjacencies") is not None:
for adj in node["adjacencies"]:
G.add_edge(node["id"], adj["nodeTo"], **adj["data"])
return G
[文档]@not_implemented_for("multigraph")
def jit_data(G, indent=None, default=None):
"""Returns data in JIT JSON format.
Parameters
----------
G : NetworkX Graph
indent: optional, default=None
If indent is a non-negative integer, then JSON array elements and
object members will be pretty-printed with that indent level.
An indent level of 0, or negative, will only insert newlines.
None (the default) selects the most compact representation.
default: optional, default=None
It will pass the value to the json.dumps function in order to
be able to serialize custom objects used as nodes.
Returns
-------
data: JIT JSON string
.. deprecated:: 2.6
"""
warnings.warn(
("jit_data is deprecated and will be removed in NetworkX 3.0."),
DeprecationWarning,
)
json_graph = []
for node in G.nodes():
json_node = {"id": node, "name": node}
# node data
json_node["data"] = G.nodes[node]
# adjacencies
if G[node]:
json_node["adjacencies"] = []
for neighbour in G[node]:
adjacency = {"nodeTo": neighbour}
# adjacency data
adjacency["data"] = G.edges[node, neighbour]
json_node["adjacencies"].append(adjacency)
json_graph.append(json_node)
return json.dumps(json_graph, indent=indent, default=default)