How to check if a key is present in json using ijson module python?

Question

I have a json file and I'm using ijson for the same but for different files the top-level key is different. Is there any way I can find if the key is present or not

    f = open(filename)
    objects = ijson.items(f, "BulkData.item") # If BulkData is a key or not

You can do that with the ijson low-level interfaces: pypi.org/project/ijson/#lower-level-interfaces — Nick ODell
– Nick ODell, Commented May 30, 2022 at 3:09

rzlvmp · Accepted Answer · 2022-05-30 04:14:01Z

1

let's say that you have JSON like:

{
 "a": {
   "b": "c"
  }
}

And your code is:

key = "a.b"

with open("example.json") as f:
  objects = ijson.items(f, key)
  objects_list = list(objects)
  if len(objects_list) == 0:
    result_value = None
  else:
    result_value = objects_list[0]

if result_value is not None:
  print(result_value)
else:
  print(f"here is no {key} key")

if you set a.b key c will be printed

in other case here is no key will be printed

answered May 30, 2022 at 4:14

rzlvmp

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