Python Delete Field from Json File

Question

Given a json object of the form :

{
   "version": "3.0.0",
   "tags": [
     {
       "name": "Name1"
     },
     {
       "name": "Name2"
     },
     {
       "name": "Name3"
     }
   ]
 }

I want to delete all tags which have their names present in a list (eg : ['Name2', 'Name4']) and output the result in another json file.

Output Example :

{
   "version": "3.0.0",
   "tags": [
     {
       "name": "Name1"
     },
     {
       "name": "Name3"
     }
   ]
 }

Siddharth Sharma · Accepted Answer · 2020-11-09 10:55:17Z

2

Simple filter and update

updated_tags = [d for d in tags if d['name'].upper() not in (tag.upper() for tag in REMOVE_TAGS)]
dict['tags'] = updated_tags

answered Nov 9, 2020 at 10:55

Siddharth Sharma

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Comments

trigonom · Accepted Answer · 2020-11-09 10:43:10Z

1

create a new tags list and replace it in JSON

tags = []
for item in my_json["tags"]:
    if item["name"] not in remove_set:
        tags.append(item)

my_json["tags"] = tags

if you want to do it on the actual list

for i in range(-1, (-1*len(my_json["tags"])+1),-1): # you need to iterate backwards because you are removing items from list during iteration 
    if my_json["tags"][i]["name"] in remove_set:
        my_json["tags"].pop(i)

answered Nov 9, 2020 at 10:43

trigonom

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