Python '；urllib'；关于无限循环

有一段时间，我一直在尝试使用cloud9来帮助我完成工作中的重复任务。然而，这些任务中的大多数都涉及到web抓取，我很难使用urllib库

即使对于简单的代码，它也不起作用。它一直在运行，我找不到原因。我会很感激一些提示

from urllib.request import urlopen
import json
import ssl

# Ignore SSL certificate errors
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE

url = ('Enter - ')
html = urlopen(url, context=ctx).read()
str_data = open(html).read()
json_data = json.loads(str_data)

for entry in json_data:

name = entry[0];
    title = entry[1];
    print((name, title))

---

如果不提供很多调试信息，人们只能假设您可能正在超时，因为您没有为urlopen函数提供超时

---

为了避免这种情况，请为urlopen函数设置一个合理的超时，这样它就不会无限期地运行

帮你自己一个忙，换成。您的示例简化为：

导入请求
url=“…”
json_data=requests.get（url）.json（）
对于json_数据中的条目：
名称=条目[0]
标题=条目[1]
印刷品（姓名、标题）

这也消除了代码中大量错误的可能性。

新代码

import requests
import json

url = "-"
json_data = requests.get(url).json()
info = json.loads(json_data)

print('User count:', len(info))
print(info)

调试模式：

[IKP3db-g] 15:43:52,971733 - INFO - IKP3db 1.4.1 - Inouk Python Debugger for CPython 3.6+
[IKP3db-g] 15:43:52,972714 - INFO - IKP3db listening on 127.0.0.1:15471
[IKP3db-g] 15:43:53,003016 - INFO - Connected with 127.0.0.1:50936
Traceback (most recent call last):
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 157, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/connection.py", line 84, in create_connection
    raise err
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/connection.py", line 74, in create_connection
    sock.connect(sa)
TimeoutError: [Errno 110] Connection timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 672, in urlopen
    chunked=chunked,
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 376, in _make_request
    self._validate_conn(conn)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 994, in _validate_conn
    conn.connect()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 334, in connect
    conn = self._new_conn()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 169, in _new_conn
    self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7fa2bb9729e8>: Failed to establish a new connection: [Errno 110] Connection timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 720, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/retry.py", line 436, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='ot.cloud.mapsfinancial.com', port=443): Max retries exceeded with url: /pegasus/api/consulta/caixa/saldos/carteira/DVG1%20FIA/2018-01-08 (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7fa2bb9729e8>: Failed to establish a new connection: [Errno 110] Connection timed out',))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/ikp3db.py", line 2047, in main
  File "/usr/local/lib/python3.6/dist-packages/ikp3db.py", line 1526, in _runscript
    exec(statement, globals, locals)
  File "<string>", line 1, in <module>
  File "/home/ubuntu/environment/Testing.py", line 5, in <module>
    json_data = requests.get(url).json()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py", line 75, in get
    return request('get', url, params=params, **kwargs)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='ot.cloud.mapsfinancial.com', port=443): Max retries exceeded with url: xxxxxxxx (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7fa2bb9729e8>: Failed to establish a new connection: [Errno 110] Connection timed out',))[IKP3db-g] 15:46:04,668520 - INFO - Uncaught exception. Entering post mortem debugging

[IKP3db-g]15:43:52971733-INFO-IKP3db 1.4.1-CPython 3.6的Inouk Python调试器+
[IKP3B-g]15:43:52972714-信息-IKP3B收听127.0.0.1:15471
[IKP3B-g]15:43:53003016-信息-与127.0.0.1:50936连接
回溯（最近一次呼叫最后一次）：
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/connection.py”，位于康涅狄格州新州第157行
（self.\u dns\u主机，self.port），self.timeout，**额外\u千瓦
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/util/connection.py”，第84行，在create_connection中
提出错误
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/util/connection.py”，第74行，在create_connection中
sock.connect（sa）
TimeoutError:[Errno 110]连接超时
在处理上述异常期间，发生了另一个异常：
回溯（最近一次呼叫最后一次）：
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/connectionpool.py”，urlopen中的第672行
分块的，
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/connectionpool.py”，第376行，在请求中
自我验证连接（连接）
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/connectionpool.py”，第994行，位于康涅狄格州的
连接
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/connection.py”，第334行，在connect中
conn=自我。_new_conn（）
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/connection.py”，第169行，位于康涅狄格州的新州
self，“无法建立新连接：%s”%e
urllib3.exceptions.NewConnectionError:：未能建立新连接：[Errno 110]连接超时
在处理上述异常期间，发生了另一个异常：
回溯（最近一次呼叫最后一次）：
文件“/home/ubuntu/.local/lib/python3.6/site packages/requests/adapters.py”，第449行，在send中
超时=超时
urlopen中的文件“/home/ubuntu/.local/lib/python3.6/site packages/urlib3/connectionpool.py”，第720行
方法，url，error=e，_pool=self，_stacktrace=sys.exc_info（）[2]
文件“/home/ubuntu/.local/lib/python3.6/site packages/urllib3/util/retry.py”，第436行，增量
引发MaxRetryError（_池、url、错误或响应错误（原因））
urllib3.exceptions.MaxRetryError:HTTPSConnectionPool（host='ot.cloud.mapsfinancial.com'，port=443）：url超过了最大重试次数：/pegasus/api/consulta/caixa/saldos/carteria/DVG1%20FIA/2018-01-08（由NewConnectionError引起（'：未能建立新连接：[Errno 110]连接超时'，））
在处理上述异常期间，发生了另一个异常：
回溯（最近一次呼叫最后一次）：
文件“/usr/local/lib/python3.6/dist-packages/ikp3db.py”，主目录第2047行
文件“/usr/local/lib/python3.6/dist-packages/ikp3db.py”，第1526行，在运行脚本中
执行官（语句、全局、局部）
文件“”，第1行，在
文件“/home/ubuntu/environment/Testing.py”，第5行，在
json_data=requests.get（url）.json（）
文件“/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py”，get第75行
返回请求（'get'，url，params=params，**kwargs）
文件“/home/ubuntu/.local/lib/python3.6/site packages/requests/api.py”，请求中的第60行
return session.request（method=method，url=url，**kwargs）
文件“/home/ubuntu/.local/lib/python3.6/site packages/requests/sessions.py”，请求中的第533行
resp=自我发送（准备，**发送）
文件“/home/ubuntu/.local/lib/python3.6/site packages/requests/sessions.py”，第646行，在send中
r=适配器.send（请求，**kwargs）
文件“/home/ubuntu/.local/lib/python3.6/site packages/requests/adapters.py”，第516行，在send中
raise ConnectionError（e，请求=请求）
requests.exceptions.ConnectionError:HTTPSConnectionPool（host='ot.cloud.mapsfinancial.com'，port=443）：url:xxxxxxxx超过了最大重试次数（由NewConnectionError（':Failed to Building new connection:[Errno 110]connection timed out'，）[IKP3db-g]15:46:04668520-信息-未捕获异常引起。进入后期调试

我听从了你的建议，但不幸的是，我也遇到了同样的问题。亚历克斯，你是对的。这是一个包含超时功能的切割器移动。