k = [ [ u'\u 6c34\u 679c' ] , [ u'\u 996e\u 54c1' ] , [ ] , [ u'\u 725b\u 5c0f\u 6392' ] , [ u'\u 9999\u 828b' ] , [ u'\u 6155\u 65af' ] , [ u'\u 5feb\u 9910' ] , [ u'\u 6930\u 5b50' u'\u 571f\u 53f8' ] ]
print "before:" , k
filtered = [ item for item in k if item]
print "after: " , filtered
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stdout
before: [[u'\u6c34\u679c'], [u'\u996e\u54c1'], [], [u'\u725b\u5c0f\u6392'], [u'\u9999\u828b'], [u'\u6155\u65af'], [u'\u5feb\u9910'], [u'\u6930\u5b50\u571f\u53f8']]
after: [[u'\u6c34\u679c'], [u'\u996e\u54c1'], [u'\u725b\u5c0f\u6392'], [u'\u9999\u828b'], [u'\u6155\u65af'], [u'\u5feb\u9910'], [u'\u6930\u5b50\u571f\u53f8']]