input: Write a python function to check if there are any even numbers in a list.
  assert my_func([1, 3, 5, 7, 9]) == False
  assert my_func([1, 2, 3, 4, 5]) == True
  assert my_func([11, 13, 17, 19]) == False
  assert my_func([2, 4, 6, 8]) == True
output: def my_func(lst):
      for num in lst:
          if num % 2 == 0:
              return True
      return False