Finding the Indices of multiple items in a list, using a list

python list

N = []for i in range(len(L)):    if L[i] in R:        N.append(i)

or with a generator

N = [i for i in range(len(L)) if L[i] in R]

or with arrays

import numpy as npN=np.where(np.isin(L,R))

python list

N = []  for i, num in enumerate(L):      if num in R:          N.append(i)

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