Python: Uniqueness for list of lists

Question

I am curious what would be an efficient way of uniquefying such data objects:

testdata =[ [\'9034968\', \'ETH\'], [\'14160113\', \'ETH\'], [\'9034968\', \'ETH         


        

Answer 1

Use unique in numpy to solve this:

import numpy as np

np.unique(np.array(testdata), axis=0)

Note that the axis keyword needs to be specified otherwise the list is first flattened.

Alternatively, use vstack:

np.vstack({tuple(row) for row in testdata})