Question

现在我有一个看起来像这样的JSON文件：

"suggested":[{
    "city": "Berlin",
    "location": "Europe",
    "hotels": true,
    "restaurants": true,
    "rivers": false},
    {
        "city": "Andorra",
        "location": "Global",
        "hotels": false,
        "restaurants": true,
        "rivers": true
    }]

我想将在“字典”中拆分的JSON文件与此“参考” JSON文件进行比较：

"master":[{
    "city": "",
    "location": "Europe",
    "hotels": true,
    "restaurants": false,
    "rivers": false
}]

我的目标是将"master" JSON中的键的值与"suggested" JSON文件中的内部字典的值进行比较，并返回打印出它们具有多少个匹配项。例如：

"Berlin" matches with "Master" in (3) fields.

现在，我使用简单的功能在python内部打开了JSON文件：

def openJsonFile(file):
    with open (file) as json_data:
        workData = json.load(json_data)
        return(workData)

此功能可循环浏览打开的文件：

def compareJsonFiles(suggested, master):
    matches = 0
    for key in suggested.keys():
        value = suggested[key]
        if key not in master:
            print ("{0} doesn't have value in {1}".format(key, master))
        else:
            if master[key] == value:
                print("for key %s values match" % key)
                matches + 1
    print(matches)

但是当我尝试通过字典时，出现此错误：

AttributeError: 'list' object has no attribute 'keys'

更新：我做了这个功能，试图将json列表中的每个值作为单独的字典传递。

def jsonToDict(file):
for lsdt in file:
    newListDic = file[lsdt]
    for key in newListDic.keys():
        value = newListDic[key]
        print(value)

它可以给我一个命令。但提示：

TypeError: list indices must be integers or slices, not dict

如何在JSON文件中循环浏览几个字典，然后将键值与另一个JSON文件进行比较？

P.S .：我已经搜索了近两天，但都没有成功，因此，如果帖子中发生的第一件事不是“标记为重复标记”，我将感到高兴。

Answer 1

您的master节点是列表，而不是字典。如果您确定母版始终只保留一个条目，则通过

compareJsonFiles(suggested_data, master_data[0])

Answer 2

看看Cerberus（不要与Kerberos混淆） http://docs.python-cerberus.org/en/stable/usage.html#basic-usage

所需的一切，以及更多-通用JSON数据验证和方案实施。

Answer 3

正如我在评论中所说，两个输入文件的内容不是有效的JSON格式。

这里是其中的修改版本，可以进行测试：

suggested.json：

{
    "suggested": [
        {
            "city": "Berlin",
            "location": "Europe",
            "hotels": true,
            "restaurants": true,
            "rivers": false
        },
        {
            "city": "Andorra",
            "location": "Global",
            "hotels": false,
            "restaurants": true,
            "rivers": true
        }
    ]
}

master.json：

{
    "master": [
        {
            "city": "",
            "location": "Europe",
            "hotels": true,
            "restaurants": false,
            "rivers": false
        }
    ]
}

这是您代码的修改版本，可以按照您想要的方式处理它们：

import json


def openJsonFile(file):
    with open(file) as json_data:
        workData = json.load(json_data)
        return workData


def compareJsonFiles(suggested, master):
    master_dict = master['master'][0]  # Assumes only one object in the list.

    for suggestion in suggested['suggested']:
        print('checking suggestion:', suggestion)
        matches = 0
        for key, value in suggestion.items():
            if key not in master_dict:
                print ("  {0} doesn't have value in {1}".format(key, master_dict))
            else:
                if master_dict[key] == value:
                    print("  for key %r values match" % key)
                    matches += 1
        print('  there were {} matches'.format(matches))


suggested = openJsonFile('suggested.json')
master =  openJsonFile('master.json')

compareJsonFiles(suggested, master)

以下是上面两个文件产生的输出：

checking suggestion: {'city': 'Berlin', 'location': 'Europe', 'hotels': True, 'restaurants': True, 'rivers': False}
  for key 'location' values match
  for key 'hotels' values match
  for key 'rivers' values match
  there were 3 matches
checking suggestion: {'city': 'Andorra', 'location': 'Global', 'hotels': False, 'restaurants': True, 'rivers': True}
  there were 0 matches

比较JSON文件中的多个词典？

3 个答案: