it says:
File "Test.py", line 4, in <module>
connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pika/adapters/blocking_connection.py", line 339, in __init__
self._process_io_for_connection_setup()
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pika/adapters/blocking_connection.py", line 374, in _process_io_for_connection_setup
self._open_error_result.is_ready)