Traceback (most recent call last):


 "...\site-packages\pymc3\sampling.py", line 406, in sample

step = assign_step_methods(model, step, step_kwargs=kwargs)


 "...\site-packages\pymc3\sampling.py", line 155, in assign_step_methods

return instantiate_steppers(model, steps, selected_steps, step_kwargs)


 "...\site-packages\pymc3\sampling.py", line 81, in instantiate_steppers

raise ValueError('Unused step method arguments: %s' % unused_args)
ValueError: Unused step method arguments: {'parallelize'}

Traceback (most recent call last):


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/botocore/httpsession.py", line 258, in send

decode_content=False,


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/connectionpool.py", line 638, in urlopen

_stacktrace=sys.exc_info()[2])


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/util/retry.py", line 343, in increment

raise six.reraise(type(error), error, _stacktrace)


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/packages/six.py", line 686, in reraise

raise value


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/connectionpool.py", line 600, in urlopen

chunked=chunked)


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/connectionpool.py", line 354, in _make_request

conn.request(method, url, **httplib_request_kw)


 "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 1229, in request

self._send_request(method, url, body, headers, encode_chunked)


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/botocore/awsrequest.py", line 125, in _send_request

method, url, body, headers, *args, **kwargs)


 "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 1275, in _send_request

self.endheaders(body, encode_chunked=encode_chunked)


 "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 1224, in endheaders

self._send_output(message_body, encode_chunked=encode_chunked)


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/botocore/awsrequest.py", line 152, in _send_output

self.send(msg)


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/botocore/awsrequest.py", line 236, in send

return super(AWSConnection, self).send(str)


 "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py", line 956, in send

self.connect()


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/connection.py", line 181, in connect

conn = self._new_conn()


 "/Users/echan/Library/Python/3.7/lib/python/site-packages/urllib3/connection.py", line 168, in _new_conn

self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <botocore.awsrequest.AWSHTTPConnection object at 0x1078fe128>: Failed to establish a new connection: [Errno 61] Connection refused
