我使用以太坊创建了一个区块链应用程序，我下载了一个虚拟盒子。我在虚拟盒子上激活了智能合约，并将其连接到原始设备上的 Python 文件。执行应用程序时，我收到此错误：
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 144, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 83, in create_connection
raise err
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 73, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 601, in urlopen
chunked=chunked)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 357, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.6/http/client.py", line 1281, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1327, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1276, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1042, in _send_output
self.send(msg)
File "/usr/lib/python3.6/http/client.py", line 980, in send
self.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 169, in connect
conn = self._new_conn()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 153, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fccac7ca5f8>: Failed to establish a new connection: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 440, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 639, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 398, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='127.0.0.1', port=7545): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fccac7ca5f8>: Failed to establish a new connection: [Errno 111] Connection refused',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "final.py", line 18, in <module>
web3.eth.defaultAccount = web3.eth.accounts[0]
File "/usr/local/lib/python3.6/dist-packages/web3/eth.py", line 182, in accounts
return self.get_accounts()
File "/usr/local/lib/python3.6/dist-packages/web3/module.py", line 44, in caller
result = w3.manager.request_blocking(method_str, params, error_formatters)
File "/usr/local/lib/python3.6/dist-packages/web3/manager.py", line 154, in request_blocking
response = self._make_request(method, params)
File "/usr/local/lib/python3.6/dist-packages/web3/manager.py", line 133, in _make_request
return request_func(method, params)
File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.__call__
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/formatting.py", line 76, in apply_formatters
response = make_request(method, params)
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/gas_price_strategy.py", line 34, in middleware
return make_request(method, params)
File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.__call__
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/formatting.py", line 76, in apply_formatters
response = make_request(method, params)
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/attrdict.py", line 33, in middleware
response = make_request(method, params)
File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.__call__
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/formatting.py", line 76, in apply_formatters
response = make_request(method, params)
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/normalize_errors.py", line 25, in middleware
result = make_request(method, params)
File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.__call__
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/formatting.py", line 76, in apply_formatters
response = make_request(method, params)
File "cytoolz/functoolz.pyx", line 250, in cytoolz.functoolz.curry.__call__
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/formatting.py", line 76, in apply_formatters
response = make_request(method, params)
File "/usr/local/lib/python3.6/dist-packages/web3/middleware/exception_retry_request.py", line 105, in middleware
return make_request(method, params)
File "/usr/local/lib/python3.6/dist-packages/web3/providers/rpc.py", line 95, in make_request
**self.get_request_kwargs()
File "/usr/local/lib/python3.6/dist-packages/web3/_utils/request.py", line 39, in make_post_request
response = session.post(endpoint_uri, data=data, *args, **kwargs) # type: ignore
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 567, in post
return self.request('POST', url, data=data, json=json, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 520, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 630, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 508, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=7545): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fccac7ca5f8>: Failed to establish a new connection: [Errno 111] Connection refused',))
如何将计算机上的智能合约与虚拟盒子上的 web3.py 文件链接？？？在以太坊网络上做一些测试