code: def _unsexagesimalize(value):
      
      if isinstance(value, tuple):
          for i, component in enumerate(value):
              if i:
                  value = value + copysign(component, value) * 60.0 ** -i
              else:
                  value = component
      return value
docs: Return `value` after interpreting a (units, minutes, seconds) tuple.
  
      When `value` is not a tuple, it is simply returned.
  
      >>> _unsexagesimalize(3.25)
      3.25
  
      An input tuple is interpreted as units, minutes, and seconds.  Note
      that only the sign of `units` is significant!  So all of the
      following tuples convert into exactly the same value:
  
      >>> '%f' % _unsexagesimalize((-1, 2, 3))
      '-1.034167'
      >>> '%f' % _unsexagesimalize((-1, -2, 3))
      '-1.034167'
      >>> '%f' % _unsexagesimalize((-1, -2, -3))
      '-1.034167'