json_reader.py

import bpy
import json

def sv_main(scale=0.3):
    verts_out = []
    edges_out = []

    in_sockets = [
        ['s', 'scale', scale]
    ]

    out_sockets = [
        ['v', 'verts', verts_out],
        ['s', 'edges', edges_out]
    ]
    
    text_obj = bpy.data.texts['multifile.json']
    text_str = text_obj.as_string()
    print(text_str)
    nodes_json = json.loads(text_str)
    print(nodes_json['graphs'])

    return in_sockets, out_sockets

multifile.json

{
  "graphs": {
    "0": {
      "items": {
        "0": {
          "bl_idname": "SvGenFloatRange",
          "duration": 0.00010203810819531256,
          "name": "Float Series",
          "start": 2.624644403129448
        },
        "1": {
          "bl_idname": "ScalarMathNode",
          "duration": 0.00022125717095322628,
          "name": "function",
          "start": 2.6247534253655145
        },
        "2": {
          "bl_idname": "ScalarMathNode",
          "duration": 0.00018102859441659902,
          "name": "function.001",
          "start": 2.624980758727715
        },
        "3": {
          "bl_idname": "GenVectorsNode",
          "duration": 0.00013528255686123813,
          "name": "Vectors in",
          "start": 2.625167514306986
        },
        "4": {
          "bl_idname": "ViewerNode2",
          "duration": 0.00014540954227415526,
          "name": "Viewer Draw2",
          "start": 2.625308942896374
        }
      },
      "name": "NodeTree"
    },
    "1": {
      "items": {
        "0": {
          "bl_idname": "SvGenFloatRange",
          "duration": 6.53714368725744e-05,
          "name": "Float Series",
          "start": 2.6261603779251272
        },
        "1": {
          "bl_idname": "GenVectorsNode",
          "duration": 8.5695248977391e-05,
          "name": "Vectors in",
          "start": 2.6262328033311495
        },
        "2": {
          "bl_idname": "MatrixGenNode",
          "duration": 0.00015867938522928782,
          "name": "Matrix in",
          "start": 2.6263248541364894
        },
        "3": {
          "bl_idname": "GenListRangeIntNode",
          "duration": 5.838730900142863e-05,
          "name": "List Range Int",
          "start": 2.626488981141458
        },
        "4": {
          "bl_idname": "SvCircleNode",
          "duration": 0.00030716194376667616,
          "name": "Circle",
          "start": 2.6265529557527563
        },
        "5": {
          "bl_idname": "ViewerNode2",
          "duration": 0.00025282542893023674,
          "name": "Viewer Draw2",
          "start": 2.626866543094164
        }
      },
      "name": "NodeTree.001"
    }
  }
}