new_contents: """Scale helpers functions."""
  
  import math
  
  
  def any_scale(scale):
      """Scale helper function that allows any scale."""
      return scale
  
  def sequence_scale(scale, scale_sequence):
      """Sequence scale helper, this rounds scale to a 'sensible' value."""
      factor = math.floor(math.log10(scale))
      norm = scale / (10**factor)
  
      for s in scale_sequence:
          if norm <= s:
              return s * 10**factor
  
      return scale_sequence[0] * 10**(factor + 1)
  
  def default_scale(scale):
      """Default scale helper, this rounds scale to a 'sensible' value."""
      return sequence_scale(scale, (1, 1.25, 1.5, 1.75, 2, 2.5, 3, 4, 5, 6, 7.5, 8, 9, 10))
  
  def deg_min_sec_scale(scale):
      for x in (1.0 / 3600,
                2.0 / 3600,
                5.0 / 3600,
                10.0 / 3600,
                30.0 / 3600,
                1.0 / 60,
                2.0 / 60,
                5.0 / 60,
                10.0 / 60,
                30.0 / 60,
                1,
                2,
                5,
                10,
                30,
                60
                ):
          if scale < x:
              return x
      else:
          return x
  
subject: Move scale helpers into a separate module