import difflib
import json

d1 = {'a': 1, 'b': {'x': {'y': 1}, 'z': 2}, 'c': [1, 2, 3, 4, 5], 'd': None}
d2 = {'a': 1, 'b': {'x': {'y': 2}, 'z': 2}, 'c': [1, 2, 3, 4], 'd': None}

d1_str = json.dumps(d1, indent=4, sort_keys=True)
d2_str = json.dumps(d2, indent=4, sort_keys=True)

diff = difflib.context_diff(d1_str.splitlines(keepends=True), d2_str.splitlines(keepends=True))
print(''.join(diff))

"""
***
---
***************
*** 2,8 ****
      "a": 1,
      "b": {
          "x": {
!             "y": 1
          },
          "z": 2
      },
--- 2,8 ----
      "a": 1,
      "b": {
          "x": {
!             "y": 2
          },
          "z": 2
      },
***************
*** 10,17 ****
          1,
          2,
          3,
!         4,
!         5
      ],
      "d": null
  }--- 10,16 ----
          1,
          2,
          3,
!         4
      ],
      "d": null
  }

"""