Extract elements from numpy array, that are not in list of indexes

Question

I want to do something similar to what was asked here NumPy array, change the values that are NOT in a list of indices, but not quite the same.

Consider a nump

Answer 1

You could use the enumerate function, excluding the indexes:

[x for i, x in enumerate(a) if i not in [1, 2, 5] ]

including them:

[x for i, x in enumerate(a) if i in [1, 2, 5]]