替换JSON文件中可以由n个级别嵌套的键的值

Question

我的JSON如下所示：

{
"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/"
    }
}
}

我写了一点python，用一个新的值（即新的下载url）替换“download_url”k:v。不幸的是，它只替换了json片段中三个下载url中的一个。我知道为什么，但我有一点困难，得到解决办法，所以我在这里请求帮助。

整个json对象是“data” 所以我就这样做：

data["ROLE_NAME"]["download_url"] = download_url

其中下载url是我分配给该变量的新值 我需要做的是对任何名为[“download_url”]的密钥进行更新，而不是我在要访问的层中指定的密钥。

我的一些代码有助于：

我在代码中获取一些先前获得的值，并构建一个返回响应的url。我从响应中提取一个值，该值将用于生成下载url的值

buildinfo_url = "http://something.staging/guestAuth/app/rest/builds/?locator=buildType:%s,tags:%s,branch:branched:any" % (
    bt_number,
    list_json_load[role_name][0]['tag']
)

发送HTTP请求

client = httplib2.Http()
response, xml = client.request(buildinfo_url)

从响应xml中提取一些值并设置download\u url变量

doc = ElementTree.fromstring(xml)
for id in doc.findall('build'):
    build_id = "%s" % (id.attrib['id'])
try:
    download_url = "http://something.staging/guestAuth/repository/download/%s/%s:id/%s" % (
        bt_number,
        build_id,
        build_artifact_zip
    )
    data[role_name]["download_url"] = download_url
except NameError:
    print "something"

我想我应该递归地搜索和更新

Answer 1

使用递归

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 )

输出：

{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/'}}}