如何在 json 数组中存储多个项目而不重复？

Question

我正在尝试在 python 中开发某种点对点系统。当客户端连接到我的服务器时，客户端将所有文件发送到特定位置。当客户端向服务器发送数据时，它通过 json 执行此操作。当服务器从客户端获取信息时，它会打印它。一个例子：

{
    "Localfiles": [{
        "IPAddress": ["217.120.103.158"],
        "FileLength": 363031,
        "FileName": "chromeicon.png"
    }, {
        "IPAddress": ["217.120.103.158"],
        "FileLength": 363031,
        "FileName": "chromeicon.png"
    }]
}

这是客户端两次发送有关某个位置的信息（一个只有 1 个文件的文件夹）时打印的内容。我怎样才能做到，当我将数据附加到我的 json 数组时，它不会显示为重复项。

这是我的代码：

from twisted.internet import reactor, protocol
import os, json

data = {}  
data['Localfiles'] = []
def test(datas):
    test = json.loads(datas)
    for x in range(0,(len(test['Localfiles']))):
        if x not in data:
            data['Localfiles'].append({
                'FileName':test['Localfiles'][x]['FileName'],
                'FileLength':test['Localfiles'][x]['FileLength'],
                'IPAddress':test['Localfiles'][x]['IPAddress']
            })

    print json.dumps(data) +"\n"
    return data

class Echo(protocol.Protocol):
    def dataReceived(self, data):
        try:
            self.transport.write(json.dumps(test(data)))                  
        except ValueError:
            print "nope"

def main():
    factory = protocol.ServerFactory()
    factory.protocol = Echo
    reactor.listenTCP(5000,factory)
    reactor.run()

if __name__ == '__main__':
    main()

Answer 1

迭代完值后如何折叠字典：

import json
dic = '{"Localfiles":[{"IPAddress": ["217.120.103.158"],"FileLength": 363031,"FileName": "chromeicon.png"},{"IPAddress": ["217.120.103.158"],"FileLength": 363031,"FileName":"chromeicon.png"}]}'

data = {}  
data["Localfiles"] = []
def test(datas):
    test = json.loads(str(datas))
    for x in range(0,(len(test["Localfiles"]))):
        if x not in data:
            data["Localfiles"].append({
                "FileName":test["Localfiles"][x]["FileName"],
                "FileLength":test["Localfiles"][x]["FileLength"],
                "IPAddress":test["Localfiles"][x]["IPAddress"]
            })

    L = data["Localfiles"]
    data["Localfiles"] = list({v['FileName']:v for v in L}.values())

    return data

这给了我：

{'Localfiles': [{'FileLength': 363031,
   'FileName': 'chromeicon.png',
   'IPAddress': ['217.120.103.158']}]}

如何在 json 数组中存储多个项目而不重复？

How can I store multiple items in an json array without duplicates?

python

arrays

json

twisted