Update Nested Dictionary value using Recursion-CodePudding

I want to update Dict dictionary's value by inp dictionary's values using recursion or loop. also the format should not change mean use recursion or loop on same format please suggest a solution that is applicable to all level nesting not for this particular case

dict={
           "name": "john",
           "quality":
                       {
                         "type1":"honest",
                         "type2":"clever"
                      },
         "marks":
                 [
                     {
                          "english":34
                     },
                     {
                          "math":90
                     }
                ]
          }

inp = {
          "name" : "jack",
          "type1" : "dumb",
          "type2" : "liar",
          "english" : 28,
          "math" : 89
      }

CodePudding user response：

First, make sure you change the name of the first Dictionary, say to myDict, since dict is reserved in Python as a Class Type.

The below function will do what you are looking for, in a recursive manner.

def recursive_swipe(input_var, updates):
    if isinstance(input_var, list):
        output_var = []
        for entry in input_var:
            output_var.append(recursive_swipe(entry, updates))
    elif isinstance(input_var, dict):
        output_var = {}
        for label in input_var:
            if isinstance(input_var[label], list) or isinstance(input_var[label], dict):
                output_var[label] = recursive_swipe(input_var[label], updates)
            else:
                if label in updates:
                    output_var[label] = updates[label]
    else:
        output_var = input_var
    return output_var


myDict = recursive_swipe(myDict, inp)

You may look for more optimal solutions if there are some limits to the formatting of the two dictionaries that were not stated in your question.

CodePudding user response：

Another solution, changing the dict in-place:

dct = {
    "name": "john",
    "quality": {"type1": "honest", "type2": "clever"},
    "marks": [{"english": 34}, {"math": 90}],
}

inp = {
    "name": "jack",
    "type1": "dumb",
    "type2": "liar",
    "english": 28,
    "math": 89,
}


def change(d, inp):
    if isinstance(d, list):
        for i in d:
            change(i, inp)
    elif isinstance(d, dict):
        for k, v in d.items():
            if not isinstance(v, (list, dict)):
                d[k] = inp.get(k, v)
            else:
                change(v, inp)


change(dct, inp)
print(dct)

Prints:

{
    "name": "jack",
    "quality": {"type1": "dumb", "type2": "liar"},
    "marks": [{"english": 28}, {"math": 89}],
}