numpy - How to find the set of indices where two vectors have equal elements in Python -

i have 2 vectors in python: predictions , labels. find out set of indices these 2 vectors have equal elements. example, lets vectors are:

predictions = [4, 2, 5, 8, 3, 4, 2, 2]       labels = [4, 3, 4, 8, 2, 2, 1, 2]

so set of indices 2 vectors have equal elements be:

indices = [0, 3, 7]

how can in python? without using for-loops etc. there built-in function example in numpy?

thank help!

this 1 way of doing numpy:

np.where(np.equal(predictions, labels))

which equivalent to:

np.equal(predictions, labels).nonzero()

it return single element tuple though, actual array, add [0] in:

np.equal(predictions, labels).nonzero()[0]

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