code: def _dstr(degrees, places=1, signed=False):
      r
      if isnan(degrees):
          return 'nan'
      sgn, d, m, s, etc = _sexagesimalize_to_int(degrees, places)
      sign = '-' if sgn < 0.0 else '+' if signed else ''
      return '%s%02ddeg %02d\' %02d.%0*d"' % (sign, d, m, s, places, etc)
docs: r"""Convert floating point `degrees` into a sexagesimal string.
  
      >>> _dstr(181.875)
      '181deg 52\' 30.0"'
      >>> _dstr(181.875, places=3)
      '181deg 52\' 30.000"'
      >>> _dstr(181.875, signed=True)
      '+181deg 52\' 30.0"'
      >>> _dstr(float('nan'))
      'nan'