Find indices of a list of values in a numpy array

Question

I have a numpy master array. Given another array of search values, with repeating elements, I want to produce the indices of these search values in the master array.

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Answer 1

Would np.searchsorted work for you ?

>>> master = np.array([1,2,3,4,5])
>>> search = np.array([4,2,2,3])
>>> np.searchsorted(master, search)
array([3, 1, 1, 2])