python - Variable that returns complete string inside list -


i have code:

topic = "test4" topics = sns.get_all_topics()    topicslist = topics['listtopicsresponse']['listtopicsresult']['topics'] topicslistnames = [t['topicarn'] t in topicslist]

that returns list:

[u'arn:aws:sns:us-east-1:10:test4', u'arn:aws:sns:us-east-1:11:test7']

what im trying create variable returns complete string relative topic variable.

i have variable topic = "test4", , want have variable topicresult returns u'arn:aws:sns:us-east-1:10:test4.

the string relative topic not in list 1st position.

do know how this?

topicresult = " ".join([t['topicarn'] t in topicslist if t['topicarn'].endswith(topic)])

this check strings in list see if topic variable end of 1 of strings. " ".join() gives string, if want keep list of strings end topic, can rid of it. if topic won't @ end of string, can check if topicis inside string. 

topicresult = " ".join([t['topicarn'] t in topicslist if topic in t['topicarn']])

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