I come to python from js. I have list like:
[{_id: '1', data: {}}, {_id: '2', data: {}}]
my goal is to get list of _id's like [1, 2]
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1Google Python list comprehensionjdaz– jdaz2020-08-09 09:47:17 +00:00Commented Aug 9, 2020 at 9:47
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3Does this answer your question? How to get data from a list Json with python?Marios– Marios2020-08-09 09:47:57 +00:00Commented Aug 9, 2020 at 9:47
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1Yes, it is what I needEdgaras Karka– Edgaras Karka2020-08-09 09:49:34 +00:00Commented Aug 9, 2020 at 9:49
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2 Answers
As it's javascript object, not a json, you need 3rd party library like demjson to convert it to json.
In [70]: import demjson
In [71]: demjson.decode("[{_id: '1', data: {}}, {_id: '2', data: {}}]")
Out[71]: [{'_id': '1', 'data': {}}, {'_id': '2', 'data': {}}]
In [72]: converted_json = demjson.decode("[{_id: '1', data: {}}, {_id: '2', data: {}}]")
In [74]: [int(i["_id"]) for i in converted_json]
Out[74]: [1, 2]
Comments
Try this simple list comprehension -
j = [{'_id': '1', 'data': {}}, {'_id': '2', 'data': {}}]
#One liner
[int(i.get('_id')) for i in j]
[1,2]
