Raising elements of a list to a power

Another map pattern, using lambda instead of function.partial():

numbers=[1,2,3,4]
squares=list(map(lambda x:pow(x,2),numbers))
print(squares)

Use list comprehension:

def power(my_list):
    return [ x**3 for x in my_list ]

https://docs.python.org/3.4/tutorial/datastructures.html#list-comprehensions