CODEWITHSUNDEEP
python
David542
David542

Reputation: 110163

Convert double for loop into list comprehension

I have the following json object:

{u'trailerAvailable': False, u'number': 10, u'watched': False, u'starringCast': u'Jan Fedder,Anja Nejarri', u'genres': [u'Krimi'], u'title': u'S\xfc\xdfes Jenseits', u'ancestorTitles': [{u'contentType': u'SERIES', u'titleId': u'B00ILY1FWE', u'title': u'Gro\xdfstadtrevier'}, {u'contentType': u'SEASON', u'number': 19, u'titleId': u'B00ILZTVXI', u'title': u'Gro\xdfstadtrevier - Staffel 19'}], u'restricted': False, u'synopsis': u"Dirk Matthies und Katja Metz erhalten einen entscheidenden Tipp, um endlich Hannes Rogolski alias 'die Ziege' zu fassen. Allerdings bringt der schwer kranke Informant dadurch seine Lebensgef\xe4hrtin Hilde in Gefahr.", u'titleId': u'B00ILZOQWE', u'watchCompleted': False, u'creditsStartTimeMillis': 2836000, u'customerReviewsCollectionIncluded': True, u'contentType': u'EPISODE', u'childTitles': [], u'studioOrNetwork': u'ARD', u'amazonRating': {u'count': 0, u'rating': 0.0}, u'watchedPositionMillis': {u'valueMillis': 0}, u'listInfo': [], u'previewAvailable': False, u'subtitles': {u'content': {u'languages': []}, u'preview': {u'languages': []}, u'trailer': {u'languages': []}}, u'restrictions': [], u'regulatoryRating': u'12', u'releaseOrFirstAiringDate': {u'valueFormatted': u'2005-03-21T00:00:00', u'valueDate': 1111363200000000}, u'hasSubtitles': False, u'formats': [{u'hasMobileTrailerEncode': False, u'videoAspectRatio': 0.0, u'offers': [{u'asin': u'B0043YVHMY', u'offerType': u'SUBSCRIPTION', u'buyable': False}, {u'asin': u'B00ILZOQWE', u'price': {u'valueFormatted': u'1,49\u20ac', u'valueLong': 149.0}, u'offerType': u'PURCHASE', u'purchaseButtonText': u'Buy episode - 1,49\u20ac', u'buyable': True}, {u'rentalExpiryTermFromPurchase': {u'valueMillis': 2592000000, u'valueFormatted': u'30 days to start watching'}, u'asin': u'B00QVECS4U', u'rentalExpiryTermFromStart': {u'valueMillis': 86400000, u'valueFormatted': u'24 hours to complete watching'}, u'offerType': u'RENTAL', u'buyable': False}], u'audioFormatTypes': [u'STEREO'], u'videoFormatType': u'SD', u'hasMobileEncode': True, u'images': [{u'heightPx': 0, u'widthPx': 0, u'type': u'COVER_ART_TV', u'uri': u'http://ecx.images-amazon.com/images/I/51a8c53GcjL._UR667,500_V1_PJStripe-Prime-Only-500px,TopLeft,0,0_.jpg'}, {u'heightPx': 0, u'widthPx': 0, u'type': u'COVER_ART_TV', u'uri': u'http://ecx.images-amazon.com/images/I/51a8c53GcjL._UR667,500_V1_PJStripe-Prime-Only-500px,TopLeft,0,0_.jpg'}], u'hasTrailerEncode': False, u'hasEncode': True}, {u'hasMobileTrailerEncode': False, u'videoAspectRatio': 0.0, u'offers': [{u'asin': u'B0043YVHMY', u'offerType': u'SUBSCRIPTION', u'buyable': False}, {u'asin': u'B00ILZOR9Q', u'offerType': u'PURCHASE', u'buyable': False}, {u'rentalExpiryTermFromPurchase': {u'valueMillis': 2592000000, u'valueFormatted': u'30 days to start watching'}, u'asin': u'B00QVFSN0W', u'rentalExpiryTermFromStart': {u'valueMillis': 86400000, u'valueFormatted': u'24 hours to complete watching'}, u'offerType': u'RENTAL', u'buyable': False}], u'audioFormatTypes': [u'STEREO'], u'videoFormatType': u'HD', u'hasMobileEncode': False, u'images': [{u'heightPx': 0, u'widthPx': 0, u'type': u'COVER_ART_TV', u'uri': u'http://ecx.images-amazon.com/images/I/51a8c53GcjL._UR667,500_V1_PJStripe-Prime-Only-500px,TopLeft,0,0_.jpg'}, {u'heightPx': 0, u'widthPx': 0, u'type': u'COVER_ART_TV', u'uri': u'http://ecx.images-amazon.com/images/I/51a8c53GcjL._UR667,500_V1_PJStripe-Prime-Only-500px,TopLeft,0,0_.jpg'}], u'hasTrailerEncode': False, u'hasEncode': False}], u'customerReviewCollection': {u'customerReviews': [], u'customerReviewSummary': {u'totalReviewCount': 0, u'threeStarReviewCount': 0, u'averageOverallRating': 0.0, u'twoStarReviewCount': 0, u'fiveStarReviewCount': 0, u'oneStarReviewCount': 0, u'fourStarReviewCount': 0}}, u'runtime': {u'valueMillis': 2820000, u'valueFormatted': u'47m'}, u'contractID': u'UXSG4'}

I am trying to get all the asins by doing:

possible_episode_ids = []
for item in t['formats']:
    for i in item['offers']:
        possible_episode_ids.append(i['asin']) 

>>> possible_episode_ids
[u'B0043YVHMY', u'B00ILZOQWE', u'B00QVECS4U', u'B0043YVHMY', u'B00ILZOR9Q', u'B00QVFSN0W']

How would I do this with a list comprehension?

Upvotes: 0

Views: 74

Answers (3)

phihag
phihag

Reputation: 287835

Just copy the existing lines:

possible_episode_ids = [
    i['asin']
    for item in t['formats']
    for i in item['offers']
]

Upvotes: 1

Anoop
Anoop

Reputation: 2798

possible_episode_ids = [j['asin'] for i in t['formats'] for j in i['offers']]

Upvotes: 1

Kwan
Kwan

Reputation: 257

Try this:

possible_episode_ids=[offer['asin']  for fmt in t['formats'] for offer in fmt['offers']]

Upvotes: 1

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