filter odd & even from a given a list, and return a list of 2 lists

filter.py

def filter(array):
  odd_numbers, even_numbers = [], []
  for num in array:
    if num % 2 == 0:
      even_numbers.append(num)
    else:
      odd_numbers.append(num)
  return [even_numbers, odd_numbers]


array = [4, 1, 8, 5, 10, 3, 9] 
print(filter(array))