我正在使用Python requests库请求一个带有这种代码的API：
api_request = requests.get(f"http://data.api.org/search?q=example&ontologies=BFO&roots_only=true",
headers={'Authorization': 'apikey token=' + 'be03c61f-2ab8'})
api_result = api_request.json()
collection = api_result["collection"]
...
这段代码在我不请求大量内容时运行良好，但否则会出现错误。奇怪的是，并非每次请求大量内容时都会出现错误。错误消息如下：
Traceback (most recent call last):
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 160, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/util/connection.py", line 61, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/usr/lib/python3.6/socket.py", line 745, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -3] Temporary failure in name resolution
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 677, in urlopen
chunked=chunked,
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 392, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/usr/lib/python3.6/http/client.py", line 964, in send
self.connect()
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 187, in connect
conn = self._new_conn()
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 172, in _new_conn
self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f4bdeca7080>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/nobu/.local/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 725, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/home/nobu/.local/lib/python3.6/site-packages/urllib3/util/retry.py", line 439, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='data.api.org', port=80): Max retries exceeded with url: /ontologies/NCIT/classes/http%3A%2F%2Fncicb.nci.nih.gov%2Fxml%2Fowl%2FEVS%2FThesaurus.owl%23C48481/descendants (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f4bdeca7080>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "new_format.py", line 181, in <module>
ontology_api(extraction(90))
File "new_format.py", line 142, in ontology_api
concept_extraction(collection)
File "new_format.py", line 100, in concept_extraction
api_request_tree = requests.get(f"{leaf}", headers={'Authorization': 'apikey token=' + f'{api_key}'})
File "/home/nobu/.local/lib/python3.6/site-packages/requests/api.py", line 76, in get
return request('get', url, params=params, **kwargs)
File "/home/nobu/.local/lib/python3.6/site-packages/requests/api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "/home/nobu/.local/lib/python3.6/site-packages/requests/sessions.py", line 530, in request
resp = self.send(prep, **send_kwargs)
File "/home/nobu/.local/lib/python3.6/site-packages/requests/sessions.py", line 643, in send
r = adapter.send(request, **kwargs)
File "/home/nobu/.local/lib/python3.6/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='data.api.org', port=80): Max retries exceeded with url: /ontologies/NCIT/classes/http%3A%2F%2Fncicb.nci.nih.gov%2Fxml%2Fowl%2FEVS%2FThesaurus.owl%23C48481/descendants (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f4bdeca7080>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
我不知道是否因为我过度请求API而导致错误，或者是由于其他原因。我无法在SO或其他地方找到解决我的问题的答案。
提前感谢您的时间和关注。
session = requests.Session()然后session.mount('http://', requests.adapters.HTTPAdapter(max_retries=100))。 - Takamura