Python numpy.ndarray compare

How can I compare array elements in a numpy.ndarray?

My ndarray is like this

array([[ 781,   94],
       [ 781,  656],
       [1367,   94],
       [1367,  656]])

Required Output:

array([781, 94, 656, 1367])

Copyright Notice：Content Author:「SRehman」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/28786354/python-numpy-ndarray-compare

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