在python循环中将值添加到字典时出错

Question

尝试在python中解析Json结构并使用键“ cat”添加新值：

data = []

for x in a:
    for y in x['Hp'].values():
        for z in y:
            for k in z['abc']['xyz']:
                for m in data:
                    det = m['response']
                    // Some processing with det whose output is stored in s 
                    k['cat'] = s
    print x

但是，当打印x时，仅将最后一个值附加到整个字典中，而s则具有不同的值。 很明显，每次循环时都会覆盖“ cat”键，但找不到正确的方法

下面是一个示例Json结构：

{
    "_id" : ObjectId("asdasda156121s"),
    "Hp" : {
        "bermud" : [ 
            {
                "abc" : {
                    "gfh" : 1,
                    "fgh" : 0.0,
                    "xyz" : [ 
                        {
                            "kjl" : "0",
                            "bnv" : 0,
                        }
                    ],
                    "xvc" : "bv",
                    "hgth" : "INnn",
                    "sdf" : 0,
                    }
                }
            },
           {
                "abc" : {
                    "gfh" : 1,
                    "fgh" : 0.0,
                    "xyz" : [ 
                        {
                            "kjl" : "0",
                            "bnv" : 0,
                        }
                    ],
                    "xvc" : "bv",
                    "hgth" : "INnn",
                    "sdf" : 0,
                    }
                }
            },
            ..

Answer 1

如果要存储所有值更改

k['cat'] = s

到

if 'cat' in k.keys():
    k['cat'] += s
else:
    k['cat'] = s

如果您只想存储第一个更改

k['cat'] = s

到

if 'cat' not in k.keys():
    k['cat'] = s