What is the most efficient method for removing nested keys and their corresponding curly braces in a Python dictionary?

Currently, I have a JSON file loaded as a dictionary using json.loads:

dict = {
 "Area":[
  {
    "id": "aira-01",
    "vis": [
     "menu"
     "hamburger"
     ]
  },
  {
    "id": "aira-02"
  }

My goal is to remove the entire key and value pair: "id": "aira-02". Since it is a nested dictionary, I crafted this code snippet to accomplish that:

for i in range(len(dict["Area"])):
    if dict["Area"][i]["id"] == "aira-02":
       del dict["Area"][i]["id"]

The result of removing "id": "aira-02" leaves behind extra curly braces { } that I also want to eliminate. Here's how the modified code looks with the unwanted braces:

"Area":[
  {
    "id": "aira-01",
    "vis": [
     "menu"
     "hamburger"
     ]
  },
  {}

Additionally, since "id": "aira-02" is removed, the remaining "id": "aira-01" should not end with a comma. The final version should look like this:

dict = {
 "Area":[
  {
    "id": "aira-01",
    "vis": ["menu", "hamburger"]
  }

I'm seeking guidance on the best approach to achieve this. Would converting the dictionary to a string be necessary to remove the extra braces and commas?

Thank you

Answer №1

If you need to eliminate elements from a list, the most efficient approach is to create a new list by filtering out the undesired elements like this:

data['Region'] = [item for item in data['Region'] if item['key'] != 'region-03']

It's important to avoid naming your variable dictionary, as it can overshadow the built-in name. In the example provided above, the name data is used instead.

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