code: def circle2circle(line):
      
      words = re.split('[(,\s)]', line)
      ra = words[1]
      dec = words[2]
      radius = words[3][:-1]  # strip the "
      if ":" in ra:
          ra = Angle(ra, unit=u.hour)
      else:
          ra = Angle(ra, unit=u.degree)
      dec = Angle(dec, unit=u.degree)
      radius = Angle(radius, unit=u.arcsecond)
      return [ra.degree, dec.degree, radius.degree]
docs: Parse a string that describes a circle in ds9 format.
  
      Parameters
      ----------
      line : str
          A string containing a DS9 region command for a circle.
  
      Returns
      -------
      circle : [ra, dec, radius]
          The center and radius of the circle.