sort odd and even ascending order numbers in separate lists

sort odd and even ascending numbers into seperate lists
numbers = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
def isEven(n) :
  return ((n % 2) == 0)
oddnumbers = []
evennumbers = []
for i in numbers:
  if isEven(i) == True:
    evennumbers.append(i)
  else:
    oddnumbers.append(i)
print(oddnumbers)
print(evennumbers)