How to multiply individual elements of a list with a number

Question

S    22  33  45 6  21 6  51 8  P   2 45   Here S is an array  How will I multiply this and get the value   SP    53 9  80 85  111 72  52 92  126 91

User · Accepted Answer

You can use built-in map function   result   map lambda x  x   P  S    or list comprehensions that is a bit more pythonic   result    x   P for x in S

User · Answer

In NumPy it is quite simple  import numpy as np P 2 45 S  22  33  45 6  21 6  51 8  SP   P np array S    I recommend taking a look at the NumPy tutorial for an explanation of the full capabilities of NumPy s arrays   https   scipy github io old-wiki pages Tentative NumPy Tutorial

User · Answer

If you use numpy multiply  S    22  33  45 6  21 6  51 8  P   2 45 multiply S  P    It gives you as a result  array  53 9   80 85  111 72  52 92  126 91

User · Answer

Here is a functional approach using map  itertools repeat and operator mul   import operator from itertools import repeat   def scalar multiplication vector  scalar       yield from map operator mul  vector  repeat scalar     Example of usage    gt  gt  gt  v    1  2  3  4   gt  gt  gt  c   3  gt  gt  gt  list scalar multiplication v  c    3  6  9  12

[python] How to multiply individual elements of a list with a number?

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