如果包含指定的短语，则删除整个 JSON 对象（从 Python 中的列表中）

Question

Have a JSON file output similar to:

{
   "object1": {
      "json_data": "{json data information}",
      "tables_data": "TABLES_DATA"
   },
   "object2": {
      "json_data": {json data information}",
      "tables_data": ""
   }
}

Essentially, if there is an empty string for tables_data as shown in object2 (eg. "tables_data": "" ), I want the entire object to be removed so that the output would look like:

{
   "object1": {
      "json_data": "{json data information}",
      "tables_data": "TABLES_DATA"
   }
}

What is the best way to go about doing this? Each of these objects correspond to a separate index in a list that I've appended called summary[] .

Answer 1

To achieve this, you could iterate through the JSON dictionary and test the tables_data values, adding the objectX elements to a new dictionary if their tables_data value passes the test:

new_dict = {k: v for k, v in json_dict.items()
            if v.get("tables_data", "") != ""}

If your JSON objectX is stored in a list as you say, these could be processed as follows using a list comprehension:

filtered_summary = [object_dict for object_dict in summary
                    if object_dict.get("tables_data", "") != ""]

Answer 2

Unless you have compelling reasons to do otherwise, the pythonic way to filter out a list or dict (or any iterable) is not to change it in place but to create a new filtered one. For your case this would look like

raw_data = YOUR_DICT_HERE_WHEREVER_IT_COMES_FROM
# NB : empty string have a false value in a boolean test
cleaned_data = {k:v for k, v in raw_data.items() if not v["table_data"]}