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  1. x = {
  2.     'a': {'z': 1},
  3.     'b': {'z': 2},
  4.     'c': {'z': 3},
  5.     'd': {'z': 4},
  6.     'e': {'z': 5},
  7.     'f': {'z': 6},
  8.     'g': {'z': 7}
  9. }
  10.  
  11. y = {
  12.     'b': {
  13.         'a': {},
  14.         'e': {
  15.             'c': {
  16.                 'd': {}
  17.             },
  18.             'f': {
  19.                 'g': {}
  20.             }
  21.         }
  22.     }
  23. }
  24.  
  25. def update(nested_dict, new_values):
  26.     for key, value in nested_dict.items():
  27.         if value:
  28.             update(value, new_values)
  29.         nested_dict[key].update(new_values[key])
  30.  
  31. update(y, x)
  32.  
  33. import json
  34. print(json.dumps(y, indent=2))
Success #stdin #stdout 0.04s 9676KB
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{
  "b": {
    "e": {
      "z": 5,
      "f": {
        "z": 6,
        "g": {
          "z": 7
        }
      },
      "c": {
        "z": 3,
        "d": {
          "z": 4
        }
      }
    },
    "z": 2,
    "a": {
      "z": 1
    }
  }
}
https://ideone.com/fCwdvO
language:
Python 3 (python  3.9.5)
created:
6 years ago
visibility:
secret

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