code: def _load_local_tzinfo():
    
    tzdir = os.environ.get("TZDIR", "/usr/share/zoneinfo/posix")
  
    localtzdata = {}
    for dirpath, _, filenames in os.walk(tzdir):
      for filename in filenames:
        filepath = os.path.join(dirpath, filename)
        name = os.path.relpath(filepath, tzdir)
  
        f = open(filepath, "rb")
        tzinfo = pytz.tzfile.build_tzinfo(name, f)
        f.close()
        localtzdata[name] = tzinfo
  
    return localtzdata
docs: Load zoneinfo from local disk.