yolk -U raises HTTPTooManyRequests error

[duke-mai]

Simply after I enter yolk -U into the command line, it stay quite for a while and then an error is raised, showing:

$ yolk -U

Checking you-get
Traceback (most recent call last):
  File "~/.local/bin/yolk", line 8, in <module>
    sys.exit(main())
  File "~/.local/lib/python3.8/site-packages/yolk/cli.py", line 1171, in main
    my_yolk.run()
  File "~/.local/lib/python3.8/site-packages/yolk/cli.py", line 224, in run
    return getattr(self, action)()
  File "~/.local/lib/python3.8/site-packages/yolk/cli.py", line 254, in show_updates
    for (project_name, version, newest) in _updates(
  File "~/.local/lib/python3.8/site-packages/yolk/cli.py", line 1117, in _updates
    results = pool.map(worker_function, names)
  File "/usr/lib/python3.8/multiprocessing/pool.py", line 364, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "/usr/lib/python3.8/multiprocessing/pool.py", line 771, in get
    raise self._value
  File "/usr/lib/python3.8/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/usr/lib/python3.8/multiprocessing/pool.py", line 48, in mapstar
    return list(map(*args))
  File "~/.local/lib/python3.8/site-packages/yolk/cli.py", line 1109, in worker_function
    (project_name, versions) = pypi.query_versions_pypi(
  File "~/.local/lib/python3.8/site-packages/yolk/pypi.py", line 147, in query_versions_pypi
    versions = self.package_releases(pypi_pkg)
  File "~/.local/lib/python3.8/site-packages/yolk/pypi.py", line 197, in package_releases
    return self.xmlrpc.package_releases(package_name)
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1109, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1450, in __request
    response = self.__transport.request(
  File "~/.local/lib/python3.8/site-packages/yolk/pypi.py", line 67, in request
    return self.parse_response(fhandle)
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1341, in parse_response
    return u.close()
  File "/usr/lib/python3.8/xmlrpc/client.py", line 655, in close
    raise Fault(**self._stack[0])
xmlrpc.client.Fault: <Fault -32500: 'HTTPTooManyRequests: The action could not be performed because there were too many requests by the client. Limit may reset in 1 seconds.'>