code: def tle(self, url, reload=False, filename=None):
          
          d = {}
          with self.open(url, reload=reload, filename=filename) as f:
              for names, sat in parse_tle(f):
                  d[sat.model.satnum] = sat
                  for name in names:
                      d[name] = sat
          return d
docs: Load and parse a satellite TLE file.
  
          Given a URL or a local path, this loads a file of three-line records in
          the common Celestrak file format, or two-line records like those from
          space-track.org. For a three-line element set, each first line gives
          the name of a satellite and the following two lines are the TLE orbital
          elements. A two-line element set comprises only these last two lines.
  
          See the :meth:`~skyfield.iokit.Loader.open()` documentation for
          the meaning of the ``reload`` and ``filename`` parameters.
  
          Returns a dictionary whose keys are satellite names and numbers,
          and whose values are :class:`~skyfield.sgp4lib.EarthSatellite`
          objects.  If you want to build a list in which each satellite
          appears only once, simply run ``sats = set(d.values())`` on the
          returned dictionary.