http://gitunderground.i2p/archive/youtube-dl/commit/06da64ee51cd405b9392ba484cf7d3d31a88ee30
_TEST_DATA # define a pukka Iterable def iter_range ( stop ) : @@ -1771,15 +1768,19 @@ Line 1 # Test set as key (transformation/type, like `expected_type`) self . assertEqual ( traverse_obj ( _TEST_DATA , ( Ellipsis , T ( str . upper ) , ) ) , [ ' STR ' ] , msg = ' Function in set should be a transformation ' ) self . assertEqual ( traverse_obj ( _TEST_DATA , ( ' fail ' , T ( lambda _ : ' const ' ) ) ) , ' const ' , msg = ' Function in set should always be...