我有一个简单的函数，它将XML字符串发送到URL并进行响应。我不知道如何处理URL无效的情况。我试图把“URLError”和“socket.gaierror”（两者都显示在错误输出中），但似乎都没有捕获无效的URL错误。
import urllib.request as request
def getResponse(<params>):
xmlReq = "an XML string"
#make a new request
new_req = request.Request(url="<an invalid URL>",
data=xmlReq)
try:
xml_response = request.urlopen(new_req)
except <not sure what error goes here to catch invalid URL>:
print("Invalid URL. Aborting process.")
quit()
这是没有try-except块的原始错误输出：
Traceback (most recent call last):
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 1318, in do_open
encode_chunked=req.has_header('Transfer-encoding'))
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 1026, in _send_output
self.send(msg)
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 964, in send
self.connect()
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 1392, in connect
super().connect()
File "C:\<python storage location>\Python\Python36-32\lib\http\client.py", line 936, in connect
(self.host,self.port), self.timeout, self.source_address)
File "C:\<python storage location>\Python\Python36-32\lib\socket.py", line 704, in create_connection
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
File "C:\<python storage location>\Python\Python36-32\lib\socket.py", line 745, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11001] getaddrinfo failed
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\<my workspace>\XMLReq.py", line ##, in <module>
getResponse(<params>)
File "C:\<my workspace>\XMLReq.py", line ##, in getResponse
xml_response = request.urlopen(new_req)
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 223, in urlopen
return opener.open(url, data, timeout)
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 526, in open
response = self._open(req, data)
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 544, in _open
'_open', req)
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 504, in _call_chain
result = func(*args)
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 1361, in https_open
context=self._context, check_hostname=self._check_hostname)
File "C:\<python storage location>\Python\Python36-32\lib\urllib\request.py", line 1320, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 11001] getaddrinfo failed>
答案 0 :(得分：2)
╔════════════════════════════════════════════════════════════════╗
║ Claymore's Dual ETH + DCR/SC/LBC/PASC GPU Miner v10.0 ║
╚════════════════════════════════════════════════════════════════╝
ETH: 5 pools are specified
Main Ethereum pool is eth-asia1.nanopool.org:9999
At least 16 GB of Virtual Memory is required for multi-GPU systems
Make sure you defined GPU_MAX_ALLOC_PERCENT 100
Be careful with overclocking, use default clocks for first tests
Press "s" for current statistics, "0".."9" to turn on/off cards, "r" to reload pools, "e" or "d" to select current pool
OpenCL initializing...
AMD Cards available: 1
GPU #0: Hainan, 2048 MB available, 5 compute units
POOL/SOLO version
GPU #0: set -etha as 1 (ETH algo for slow cards)
No NVIDIA CUDA GPUs detected.
Total cards: 1
ETH: Stratum - connecting to 'eth-asia1.nanopool.org' <139.99.102.73> port 9999
ETHEREUM-ONLY MINING MODE ENABLED (-mode 1)
ETH: eth-proxy stratum mode
Watchdog enabled
Remote management (READ-ONLY MODE) is enabled on port 3333
ETH: Stratum - Connected (eth-asia1.nanopool.org:9999)
ETH: Authorized
Setting DAG epoch #159...
Setting DAG epoch #159 for GPU0
Create GPU buffer for GPU0
GPU0 - not enough GPU memory to place DAG, you cannot mine this coin with this GPU
GPU0 - OpenCL error -61 - cannot allocate big buffer for DAG. Check readme.txt for possible solutions.
Setting DAG epoch #159 for GPU0
GPU 0 failed
GPU0, OpenCL error -38 - cannot write buffer for DAG
并使用GPU_FORCE_64BIT_PTR 0
GPU_MAX_HEAP_SIZE 100
GPU_USE_SYNC_OBJECTS 1
GPU_MAX_ALLOC_PERCENT 100
GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eth-asia1.nanopool.org:9999 -ewal <my address link> -epsw x -mode 1 -ftime 10
请参阅此处的参考：https://docs.python.org/3/library/urllib.error.html