选择一列时,如何只获取列表而不是字典列表?

When selecting one column how do I just get a list instead of a list of dictionaries?

我的查询是https://data.seattle.gov/resource/y2d4-ftqb.json?$group=categories&$select=categories&$where=categories%20IS%20NOT%20NULL

输出为

[{"categories":"Training|Use of Force"}
,{"categories":"Narcotics"}
,{"categories":"Traffic|Assist"}
,{"categories":"Burglary"}
,{"categories":"Crisis"} ...

如何使输出为:

["Training|Use of Force", "Narcotics", "Traffic|Assist", "Burglary", "Crisis",...]

?

您可以请求 csv 端点,而不是请求 json 端点(这会导致您返回一个 objects 的数组):

https://data.seattle.gov/resource/y2d4-ftqb.csv?$group=categories&$select=categories&$where=categories%20IS%20NOT%20NULL

这 returns 一个 header 行 ("categories"),然后每个 non-null 类别作为常规字符串,在其自己的行上:

"categories"
"Training|Use of Force"
"Narcotics"
"Traffic|Assist"
"Burglary"
"Crisis"
...