[]
[1,nan,2]
[1,nan,nan,2]
[1,NULL,2]
[1,NULL,nan,2]
['hello','','world']
[[[]],[[],[]],[[]]]
[]
['0']
['0']
['0']
['0','1']
['0','1']
['0','1']
['0','1','2']
['0','1','2']
['0','1','2']
[(0,0),(3,1),(6,2),(9,0)]
[('0','0'),('3','1'),('6','2'),('9','0')]
[('0',0),('3',1),('6',2),('9',0)]