Using jsonschema to validate

remotes-schema.json

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "Remotes array",
  "type": "array",
  "items": {
    "title": "Remote",
    "type": "object",
    "properties": {
      "name": {
        "description": "The name of this remote machine",
        "type": "string",
        "pattern": "^[a-z-]+$"
      },
      "ipv4": {
        "description": "The ipv4 address of this remote machine",
        "type": "string",
        "format": "ipv4"
      },
      "ipv6": {
        "description": "The ipv6 address of this remote machine",
        "type": "string",
        "format": "ipv6"
      }
    },
    "required": ["name", "ipv4"]
  }
}

remotes.json

[
  {
    "name": "lxd-host",
    "ipv4": "192.168.1.128"
  },
  {
    "name": "pynomator",
    "ipv4": "192.168.1.133"
  }
]

remotes.py

import os
import json
import jsonschema

script_path = os.path.dirname(os.path.realpath(__file__))


def load_check_json(file_path="~/.config/pylotte/remotes.json"):
    # Load the schema from this script's directory
    schema_path = os.path.join(script_path, "remotes-schema.json")
    with open(schema_path) as f:
        schema = json.load(f)

    # Load the remote
    file_path = os.path.expanduser(file_path)

    with open(file_path) as f:
        data = json.load(f)

    # Validate the data (will raise exception if format fails
    jsonschema.validate(data, schema,
                        format_checker=jsonschema.FormatChecker())

    return data


print(load_check_json())