Answers for "read data from json"

python read json file

import json

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

print(data)

read json file python

import json

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

flx = json.dumps(data, ensure_ascii=False, indent=4)
print(flx)

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({});
      }

reading json

Not that difficult really it's just a formatted array that is made
in such a way to be human readable and also parsed by a piece of code 
(parsing example:
 https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/JSON )
 but the main things to remember is that it is grouped so there may be lots of 
 "names" in one part of a json file but this allows you to just find the names 
 section and see all info inside. :) hope this helped