从python上的特定列表中提取元素

Question

这是要分析的块：

('images\\Principales\\Screenshot_1.png', '{"categories":[{"name":"abstract_","score":0.00390625},{"name":"outdoor_","score":0.01171875},{"name":"outdoor_road","score":0.41796875}],"description":{"tags":["road","building","outdoor","scene","street","city","sitting","empty","light","view","driving","red","sign","intersection","green","large","riding","traffic","white","tall","blue","fire"],"captions":[{"text":"a view of a city street","confidence":0.83864323826716347}]},"requestId":"73fc14d5-653f-4a0a-a45a-e7a425580361","metadata":{"width":150,"height":153,"format":"Png"},"color":{"dominantColorForeground":"Grey","dominantColorBackground":"Grey","dominantColors":["Grey"],"accentColor":"274A68","isBWImg":false}}')

我需要提取“描述”之后的所有元素，但我不知道该怎么做……（其实我需要这个元素：

"road", "building","outdoor","scene","street","city","sitting","empty","light","view","driving","red","sign","intersection","green","large","riding","traffic","white","tall","blue","fire"

我已经找了几分钟了，但我不明白该怎么做！我是学习“列表”元素的小初学者，但我仍然很难理解。

“For”循环只返回'images\\Principales\\Screenshot_1.png'，然后剩下大块......

你有解决办法吗？

提前致谢！

编辑：

确实，它实际上是 JSON！感谢帮助过我的人：） 为了提取第二个块中包含的所需元素，我只是这样进行：

import json
ElementSeparate= '{"categories":[{"name":"abstract_","score":0.00390625},{"name":"outdoor_","score":0.01171875},{"name":"outdoor_road","score":0.41796875}],"description":{"tags":["road","building","outdoor","scene","street","city","sitting","empty","light","view","driving","red","sign","intersection","green","large","riding","traffic","white","tall","blue","fire"],"captions":[{"text":"a view of a city street","confidence":0.83864323826716347}]},"requestId":"73fc14d5-653f-4a0a-a45a-e7a425580361","metadata":{"width":150,"height":153,"format":"Png"},"color":{"dominantColorForeground":"Grey","dominantColorBackground":"Grey","dominantColors":["Grey"],"accentColor":"274A68","isBWImg":false}'
ElementSeparate = json.loads(ElementSeparate)
for a in ElementSeparate['description']['tags']:
    print a

Answer 1

对我来说，您似乎正在尝试解析 JSON。您应该对数组的第二个元素使用 JSON 解析器。您将返回列表或字典。然后你就可以从“描述”键中提取数据了。

https://docs.python.org/3/library/json.html