python multiply list by scalar

# Using a list comprehension:
l = [x * 2 for x in l]

# Using a lambda function with map:
l = map(lambda x: x * 2, l)

my_list = [1, 2, 3, 4, 5]
my_new_list = [i * 5 for i in my_list]

>>> print(my_new_list)
[5, 10, 15, 20, 25]