python - Convert a list to a numpy mask array - Stack Overflow

Published: 28 July 2025
on channel: ResponseXAI

Sure, just use broadcasting with arange(m), make sure to use an np.array for the indices, not a list...
>>> indice = [1, 0, 2]
>>> m = 3
>>> np.arange(m) <= np.array(indice)[..., None]
#false #array #array([[ #arange(m) #with

https://stackoverflow.com/questions/6... https://stackoverflow.com/questions/6...

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