How do I get all the values from a NumPy array excluding a certain index?

Question

I have a NumPy array, and I want to retrieve all the elements except a certain index. For example, consider the following array

a = [0,1,2,3,4,5,5,6,7,8,9]
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Answer 1

Another solution is to use the concatenate function of NumPy:

>>> x = np.arange(0,10)
array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
>>> i = 3
>>> np.concatenate((x[:i],x[(i+1):]))
array([0, 1, 2, 4, 5, 6, 7, 8, 9])