How to set the same value in multiple index of array once python?

I have array like this:
a=[1,2,3,4,5,6,7]

i need to replace the value of the index 1 , 4 ,5 by the value 10 but without using for loop.

the result:
a=[1,10,3,4,10,10,7]

>Solution :

I guess you could utilize numpy for this:

    import numpy as np

    a=[1,2,3,4,5,6,7]

    indecies = [1, 4, 5]

    a = np.array(a)

    a.put(indexes, 10)

result:

array([ 1, 10,  3,  4, 10, 10,  7])