How to extract elements from a list using indices in Python

Question

If you have a list in python  and want to extract elements at indices 1  2 and 5 into a new list  how would you do this   This is how I did it  but I m not very satisfied    gt  gt  gt  a  10  11  12  13  14  15   gt  gt  gt   x 1  for x in enumerate a  if x 0  in  1 2 5    11  12  15    Is there a better way   More in general  given a tuple of indices  how would you use this tuple to extract the corresponding elements from a list  even with duplication  e g  tuple  1 1 2 1 5  produces  11 11 12 11 15

User · Accepted Answer

Perhaps use this    a i  for i in  1 2 5      11  12  15

User · Answer

Bounds checked     a index  for index in  1 2 5 20  if 0  lt   index  lt  len a       11  12  15

User · Answer

Use Numpy direct array indexing  as in MATLAB  Julia        a    10  11  12  13  14  15   s    1  2  5     import numpy as np list np array a  s      11  12  15    Better yet  just stay with Numpy arrays  a   np array  10  11  12  13  14  15   a s   array  11  12  15

User · Answer

I think you re looking for this   elements    10  11  12  13  14  15  indices    1 1 2 1 5   result list    elements i  for i in indices

User · Answer

Try  numbers   range 10  16  indices    1  1  2  1  5   result    numbers i  for i in indices

[python] How to extract elements from a list using indices in Python?

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