Replace value in JSON file for key which can be nested by n levels

Question

I have JSON that looks like this:

{
\"ROLE_NAME\": {
    \"FOO\": {
        \"download_url\": \"http: //something.staging/12345/buzz.zip\"
    },
    \"BAR\"         


        

Answer 1

Using recursion

import json   
json_txt = """
{
"ROLE_NAME": {
    "FOO": {
        "download_url": "http: //something.staging/12345/buzz.zip"
    },
    "BAR": {
        "download_url": "http: //something.staging/12345/fizz.zip"
    },
    "download_url": "http: //something.staging/12345/fizzbuzz.zip",
    "db_name": "somedb",
    "db_server": "dbserver.staging.dmz",
    "plugin": {
        "server_url": "http: //lab.staging.corp/server/"
    }
}
}
"""
data = json.loads(json_txt)

def fixup(adict, k, v):
    for key in adict.keys():
        if key == k:
            adict[key] = v
        elif type(adict[key]) is dict:
            fixup(adict[key], k, v)

import pprint
pprint.pprint( data )

fixup(data, 'download_url', 'XXX')

pprint.pprint( data )

Output:

{u'ROLE_NAME': {u'BAR': {u'download_url': u'http: //something.staging/12345/fizz.zip'},
                u'FOO': {u'download_url': u'http: //something.staging/12345/buzz.zip'},
                u'db_name': u'somedb',
                u'db_server': u'dbserver.staging.dmz',
                u'download_url': u'http: //something.staging/12345/fizzbuzz.zip',
                u'plugin': {u'server_url': u'http: //lab.staging.corp/server/'}}}
{u'ROLE_NAME': {u'BAR': {u'download_url': 'XXX'},
                u'FOO': {u'download_url': 'XXX'},
                u'db_name': u'somedb',
                u'db_server': u'dbserver.staging.dmz',
                u'download_url': 'XXX',
                u'plugin': {u'server_url': u'http: //lab.staging.corp/server/'}}}