check key in json python code example

Example 1: python json check if key exists

import json
  if 'id' not in dest:
      dest['id'] = -1
    targetId = dest['id']

Example 2: how to check if json has a key python

b_in_dict =  "b" in a_dictionary

Example 3: python json check if key exist

if 'to' not in data:
    raise ValueError("No target in given data")
if 'data' not in data['to']:
    raise ValueError("No data for target")