Newbie Question re "TypeError: '<' not supported between instances of 'list' and 'int

[sr12]

def function_1(x):
    if x < 0:
        return -1000000000
    else:
        return (x ** (1-2)-1)/(1-2)

list = [1, 2, 3, 4,]

[function_1(i) for i in list] 

so I have a function (with a condition as above) -- the intent is to apply that function to each number in a list (and get a new list with the result). Getting stuck here with error: "TypeError: '<' not supported between instances of 'list' and 'int'"

all help appreciated