input: Write a function to iterate over a list of numbers and print only the even numbers. If the list is empty, print "No numbers in the list".
  
  def print_even_numbers(my_list):
      if len(my_list) == 0:
          print("No numbers in the list")
      else:
          for num in my_list:
              if num % 2 == 0:
                  print(num)
  
  assert print_even_numbers([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])==None
  assert print_even_numbers([2, 4, 6, 8, 10])==None
  assert print_even_numbers([])==None
output: def print_even_numbers(my_list):
      if len(my_list) == 0:
          print("No numbers in the list")
      else:
          for num in my_list:
              if num % 2 == 0:
                  print(num)