使用python

Question

我目前有两个需要使用python组合的json文件。基本上我想使用python将文件1中的choices数组替换为文件2中的数组。我该怎么做呢？ 文件1是：

{
    "choice_list": {
        "name": "Boston Street Names",
        "choices":[ {"value": "127906", "label": "DAVIS STREET"},
                    {"value": "129909", "label": "NORTH QUINCY STREET" },
                    { "value": "134194", "label": "ADAMS STREET" }] 
     } 
}

文件2是：

[{"value": "134484", "label": "PRISCILLA ALDEN ROAD"},
 {"value": "134487", "label": "VAN BUREN DRIVE"}]

Answer 1

使用本机python JSON库：

import json
json1 = '{\
    "choice_list": {\
        "name": "Boston Street Names",\
        "choices":[ {"value": "127906", "label": "DAVIS STREET"},\
                    {"value": "129909", "label": "NORTH QUINCY STREET" },\
                    { "value": "134194", "label": "ADAMS STREET" }]\
     } \
}'

json2 = '[{"value": "134484", "label": "PRISCILLA ALDEN ROAD"},\
 {"value": "134487", "label": "VAN BUREN DRIVE"}]'

res = json.loads(json1)
res['choice_list']['choices'] = json.loads(json2)
print json.dumps(res)

结果：

{"choice_list":
    {"name": "Boston Street Names",
     "choices":
         [{"value": "134484","label": "PRISCILLA ALDEN ROAD"},
          {"value": "134487", "label": "VAN BUREN DRIVE"}]
    }
}

loads方法接受JSON字符串并将其转换为python字典对象（所有键都为unicode）。然后，您可以加载其他JSON对象，引用要替换的键，并分配它。然后你只需转换回JSON字符串。