Python: Random list with odds and even numbers

New to python. I've got an assignment where I have to generate a random list of numbers between -10 and 30 and then proceed to call odds and evens from the list. So far I've got this, but I have no idea how to proceed and how to make it actually work properly. Also I need to figure out how to also check positive and negative numbers from the list, but currently I'm just stuck at odds and evens.

import random

def Osio7():
    randomlist = random.sample(range(-10, 30), 40)
    print(randomlist)

def odd(randomlist):
    odd = []
    for i in range(1, randomlist*2+1):
            odd.append(i)
    return Osio7

def even(randomlist):
    even = []
    for i in range(1, randomlist % 2+1):
            even.append(i)
    return Osio7