“列表索引必须为整数”-Python

Question

我的输入如下：

"custom_fields": "[{"id":360027795053,"value":"XXXX"}, 
                   {"id":360030272393,"value":"XXX"}, 
                   {"id":360027795613,"value":XXX}, 
                   {"id":360027795393,"value":"XXX"}, 
                   {"id":360027795413,"value":"XXX"}, 
                   {"id":360030272233,"value":"XXX"},
                   {"id":360027795453,"value":["XXX"]}]"

我按如下方式访问上面的内容：

dict_conversion=json.loads(custom_fields)

properties['field_1']=dict_conversion['360027795053']['value']

上面给出了以下错误：

列表索引必须为整数

看起来我正在尝试按元素名称调用元素，但不允许调用。我只能按以下索引号进行呼叫：

 properties['field_1']=dict_conversion[1]['value']

但是我更喜欢用键名来呼叫。

任何帮助，不胜感激。

Answer 1

dict_conversion是字典列表，而不是字典。首先，您应该将其转换为dict，然后使用字符串进行访问。

dict_conversion = {k:v for dct in dict_conversion for k,v in dct}

Answer 2

您可以通过首先将id转换为键，将值作为其值的dict来执行此操作

custom_fields = [{"id":360027795053,"value":"XXXX"},
                   {"id":360030272393,"value":"XXX"},
                   {"id":360027795613,"value":"XXX"},
                   {"id":360027795393,"value":"XXX"},
                   {"id":360027795413,"value":"XXX"},
                   {"id":360030272233,"value":"XXX"},
                   {"id":360027795453,"value":"XXX"}]
id_dict = {i['id']: i['value'] for i in custom_fields}
print(id_dict)
>>> {360027795053: 'XXXX', 360030272393: 'XXX', 360027795613: 'XXX', 360027795393: 'XXX', 360027795413: 'XXX', 360030272233: 'XXX', 360027795453: 'XXX'}

Answer 3

好吧，首先：'360027795053'是一个字符串，您必须删除引号以获取整数。

第二，dict_conversion是一个列表，其中dict_conversion[0]['id'] == 360027795053为真。没有'360027795053'甚至没有360027795053键。

如果要访问id为360027795053的值，最简单的方法当然是将json格式设置如下：

"[{360027795053:"XXXX"}, 
  {360030272393:"XXX"}, 
  {360027795613:"XXX"}, 
  {360027795393:"XXX"}, 
  {360027795413:"XXX"}, 
  {360030272233:"XXX"},
  {360027795453:["XXX"]}]"