input: 
  def print_numbers():
      """ Prints out numbers from 1 to 50.
      >>> print_numbers()
      1
      2
      3
      4
      5
      6
      7
      8
      9
      10
      11
      12
      13
      14
      15
      16
      17
      18
      19
      20
      21
      22
      23
      24
      25
      26
      27
      28
      29
      30
      31
      32
      33
      34
      35
      36
      37
      38
      39
      40
      41
      42
      43
      44
      45
      46
      47
      48
      49
      50
      """
      for i in range(1, 51):
          print(i)
  
output:     for i in range(1, 51):
          print(i)