Stream forcefully closed when trying to execute the sample code

[Kianoosh76]

Hi, I tried to run the sample code that is put in the readme file of the project but I faced this error:

Traceback (most recent call last):
  File "//anaconda/envs/lyan/lib/python3.5/code.py", line 91, in runcode
    exec(code, self.locals)
  File "<console>", line 1, in <module>
  File "//anaconda/envs/lyan/lib/python3.5/site-packages/apns2/client.py", line 53, in send_notification
    stream_id = self.send_notification_async(token_hex, notification, topic, priority, expiration, collapse_id)
  File "//anaconda/envs/lyan/lib/python3.5/site-packages/apns2/client.py", line 78, in send_notification_async
    stream_id = self._connection.request('POST', url, json_payload, headers)
  File "//anaconda/envs/lyan/lib/python3.5/site-packages/hyper/http20/connection.py", line 281, in request
    self.endheaders(message_body=body, final=True, stream_id=stream_id)
  File "//anaconda/envs/lyan/lib/python3.5/site-packages/hyper/http20/connection.py", line 546, in endheaders
    stream = self._get_stream(stream_id)
  File "//anaconda/envs/lyan/lib/python3.5/site-packages/hyper/http20/connection.py", line 289, in _get_stream
    raise StreamResetError("Stream forcefully closed")
hyper.http20.exceptions.StreamResetError: Stream forcefully closed

Any idea for solving this problem?
Thanks

[Dubrzr]

You are probably not using the right certificate (dev vs prod) in accordance with the use_sandbox parameter of APNSClient.
When using the dev certificate, use_sandbox=True
When using the prod certificate, use_sandbox=False

[Kianoosh76]

You are right! Thanks a lot