code: def gettz(name):
      
      warnings.warn("zoneinfo.gettz() will be removed in future versions, "
                    "to use the dateutil-provided zoneinfo files, instantiate a "
                    "ZoneInfoFile object and use ZoneInfoFile.zones.get() "
                    "instead. See the documentation for details.",
                    DeprecationWarning)
  
      if len(_CLASS_ZONE_INSTANCE) == 0:
          _CLASS_ZONE_INSTANCE.append(ZoneInfoFile(getzoneinfofile_stream()))
      return _CLASS_ZONE_INSTANCE[0].zones.get(name)
docs: This retrieves a time zone from the local zoneinfo tarball that is packaged
      with dateutil.
  
      :param name:
          An IANA-style time zone name, as found in the zoneinfo file.
  
      :return:
          Returns a :class:`dateutil.tz.tzfile` time zone object.
  
      .. warning::
          It is generally inadvisable to use this function, and it is only
          provided for API compatibility with earlier versions. This is *not*
          equivalent to ``dateutil.tz.gettz()``, which selects an appropriate
          time zone based on the inputs, favoring system zoneinfo. This is ONLY
          for accessing the dateutil-specific zoneinfo (which may be out of
          date compared to the system zoneinfo).
  
      .. deprecated:: 2.6
          If you need to use a specific zoneinfofile over the system zoneinfo,
          instantiate a :class:`dateutil.zoneinfo.ZoneInfoFile` object and call
          :func:`dateutil.zoneinfo.ZoneInfoFile.get(name)` instead.
  
          Use :func:`get_zonefile_instance` to retrieve an instance of the
          dateutil-provided zoneinfo.