input: Write a python function to generate a list of odd numbers within a given range.
  assert generate_odd_numbers(0, 10) == [1, 3, 5, 7, 9]
  assert generate_odd_numbers(10, 20) == [11, 13, 15, 17, 19]
  assert generate_odd_numbers(0, 5) == [1, 3]
output: def generate_odd_numbers(start, end):
      return [num for num in range(start, end) if num % 2 != 0]