Answers for "read json object from file"

python read json file

import json

with open('path_to_file/person.json') as f:
  data = json.load(f)

print(data)

python read json file

import json
varRaw ='''
{
    "from":{
        "max" : "xx:xx:xx:xx:xx:xx",
        "ip" : "192.168.0.20"
    },
    "data":{
        "id":"value",
        "id": "value",
        "id": "value"
    }
}
'''
#string to json
varJson = json.loads(varRaw)
#get values from json

print(varJson['from'])
#output wil be: {'max': 'xx:xx:xx:xx:xx:xx', 'ip': '192.168.0.20'}
print(varJson['from']['ip'])
#output wil be: 192.168.0.20

read json data from file

// consider your file data is something like json string but aving parse issue 
//that means some additional char is there 
fs.readFile(ROLES_FILE, "utf8", (err, data) => {
      if (err) {
        res.status(403).json({});
      }
      const [localScope, action] = scope.split(".");
      const mapper = JSON.parse(data.toString("utf8").replace(/^\uFEFF/, ""));
      const isAllowed = checkRole(mapper, localScope, action, role);
      if (isAllowed) {
        next();
      } else {
        res.status(403).json({});
      }