Mathematic Operational an integer to a bunch of value or list in python?

Question

is there other way to do an matematic operational ( add, substract, multiply divided ) from an integer foreach value inside a list ?

for example:

a = 4
arr = list(20,1,5,36,10,31,100)

the a variable need to substract/multiply/divided to all values inside those list using for function like below snippet.

ar = []
for x in arr
    a = 4*x
    ar.append(a)

Is there any a better approach to solve this rather than using for/while loop ?

take a look at `numpy` which supports vectorization on arrays. — Paritosh Singh, Dec 07 '18 at 23:03
Use `numpy` arrays which can be found https://docs.scipy.org/doc/numpy-1.15.0/user/quickstart.html . you can simply do `a = 4*np.array(arr)` — BenT, Dec 07 '18 at 23:05
More ways [here](https://stackoverflow.com/questions/8194959/how-to-multiply-individual-elements-of-a-list-with-a-number) — Sheldore, Dec 07 '18 at 23:09

score 1 · Answer 1 · answered Dec 07 '18 at 23:07

1

Numpy or other vectorization methods notwithstanding, you're looking for list comprehensions.

arr = list(20,1,5,36,10,31,100)
quadrupled_arr = [x * 4 for x in arr]

answered Dec 07 '18 at 23:07

AKX

1 Answers1