gevent协程之猴子补丁带来的坑

我们都知道使用gevent协程时，经常会看见在导入包的时候看见这样的代码

from gevent import monkey; monkey.patch_all()

monkey.patch_all()作用呢，就是将阻塞的改成非阻塞

具体有哪些呢。

Example: 执行发现报错了。loop_exit，线程异常退出。线程改成非阻塞失败。(__此问题摘自遇到此问题的一个微友)

import random, datetime, time, json

import gevent

from gevent.pool import Pool

from gevent import monkey; monkey.patch_all()

import requests

ywdata = [(0, '', 0, 0, '', 1, 1, 0, 0), (1, '', 0, 0, '', 1, 1, 0, 0), (2, '', 0, 0, '', 1, 1, 0, 0), (3, '', 0, 0, '', 1, 1, 0, 0), (4, '', 0, 0, '', 1, 1, 0, 0), (5, '', 0, 0, '', 1, 1, 0, 0), (6, '', 0, 0, '', 1, 1, 0, 0), (7, '', 0, 0, '', 1, 1, 0, 0), (8, '', 0, 0, '', 1, 1, 0, 0), (9, '', 0, 0, '', 1, 1, 0, 0), (10, '', 0, 0, '', 1, 1, 0, 0), (11, '', 0, 0, '', 1, 1, 0, 0), (12, '', 0, 0, '', 1, 1, 0, 0), (13, '', 0, 0, '', 1, 1, 0, 0), (14, '', 0, 0, '', 1, 1, 0, 0), (15, '', 0, 0, '', 1, 1, 0, 0), (16, '', 0, 0, '', 1, 1, 0, 0), (17, '', 0, 0, '', 1, 1, 0, 0), (0, '', 0, 0, '', 0, 1, 0, 0), (1, '', 0, 0, '', 0, 1, 0, 0), (2, '', 0, 0, '', 0, 1, 0, 0), (3, '', 0, 0, '', 0, 1, 0, 0), (4, '', 0, 0, '', 0, 1, 0, 0), (5, '', 0, 0, '', 0, 1, 0, 0), (6, '', 0, 0, '', 0, 1, 0, 0), (7, '', 0, 0, '', 0, 1, 0, 0), (8, '', 0, 0, '', 0, 1, 0, 0), (9, '', 0, 0, '', 0, 1, 0, 0), (10, '', 0, 0, '', 0, 1, 0, 0), (11, '', 0, 0, '', 0, 1, 0, 0), (12, '', 0, 0, '', 0, 1, 0, 0), (13, '', 0, 0, '', 0, 1, 0, 0), (14, '', 0, 0, '', 0, 1, 0, 0), (15, '', 0, 0, '', 0, 1, 0, 0), (16, '', 0, 0, '', 0, 1, 0, 0), (17, '', 0, 0, '', 0, 1, 0, 0), (0, '', 1, 1, '', 1, 2, 0, 0), (1, '', 1, 1, '', 1, 2, 0, 0), (2, '', 1, 1, '', 1, 2, 0, 0), (3, '', 1, 1, '', 1, 2, 0, 0), (4, '', 1, 1, '', 1, 2, 0, 0), (5, '', 1, 1, '', 1, 2, 0, 0), (6, '', 1, 1, '', 1, 2, 0, 0), (7, '', 1, 1, '', 1, 2, 0, 0), (8, '', 1, 1, '', 1, 2, 0, 0), (9, '', 1, 1, '', 1, 2, 0, 0), (10, '', 1, 1, '', 1, 2, 0, 0), (11, '', 1, 1, '', 1, 2, 0, 0), (12, '', 1, 1, '', 1, 2, 0, 0), (13, '', 1, 1, '', 1, 2, 0, 0), (14, '', 1, 1, '', 1, 2, 0, 0), (15, '', 1, 1, '', 1, 2, 0, 0), (16, '', 1, 1, '', 1, 2, 0, 0), (17, '', 1, 1, '', 1, 2, 0, 0), (0, '', 1, 1, '', 0, 2, 0, 0), (1, '', 1, 1, '', 0, 2, 0, 0), (2, '', 1, 1, '', 0, 2, 0, 0), (3, '', 1, 1, '', 0, 2, 0, 0), (4, '', 1, 1, '', 0, 2, 0, 0), (5, '', 1, 1, '', 0, 2, 0, 0), (6, '', 1, 1, '', 0, 2, 0, 0), (7, '', 1, 1, '', 0, 2, 0, 0), (8, '', 1, 1, '', 0, 2, 0, 0), (9, '', 1, 1, '', 0, 2, 0, 0), (10, '', 1, 1, '', 0, 2, 0, 0), (11, '', 1, 1, '', 0, 2, 0, 0), (12, '', 1, 1, '', 0, 2, 0, 0), (13, '', 1, 1, '', 0, 2, 0, 0), (14, '', 1, 1, '', 0, 2, 0, 0), (15, '', 1, 1, '', 0, 2, 0, 0), (16, '', 1, 1, '', 0, 2, 0, 0), (17, '', 1, 1, '', 0, 2, 0, 0)]

user_id = 353208547

base_product_no = "yacx_sebwylx_sy3"

api_url = 'https://api.xxxx.com'

num = 1

def calculate(api_url, birthday, pytype, limit, frequency, hasSocialSecurity, base_product_no, price):

    """

    试运算保费

    :param api_url:

    :param birthday:

    :param pytype:

    :param limit:

    :param frequency:

    :param hasSocialSecurity:

    :param base_product_no:

    :param price:

    :return:

    """

    url = "{}/api/sdb/order/cal/calculate".format(api_url)

    headers = {

        'Content-Type': "application/json",

        }

    payload = {"birthday": birthday, "paymentMethod": "{}_{}_{}".format(pytype, limit, frequency), "hasSocialSecurity":hasSocialSecurity,"baseProductNo":base_product_no}

    # print (payload)

    payload = json.dumps(payload)

    response = requests.request("POST", url, data=payload, headers=headers)

    res = response.json()

    if res["code"] == 0:

        if res["data"]['calPremium'] == price:

            return ('{"code":0,"status":succes}}')

    else:

        return res

pool = Pool(20)

taskall = []

j = 0

for i in range(len(ywdata)):

    if ywdata[i][0] != 0:

        taskall.append(pool.spawn(calculate, api_url, ywdata[i][1], ywdata[i][6], ywdata[i][2], ywdata[i][3], ywdata[i][5], base_product_no, ywdata[i][4]))

        j += 1

gevent.joinall(taskall, timeout=3, raise_error=False)

for l in taskall:

    print(l.value)

print('一共跑{}个数据'.format(j))

Error:

Traceback (most recent call last):

  File "D:\test_project\venv\pytest_env\lib\site-packages\gevent\_ffi\loop.py", line 446, in _run_callbacks

    callback(*args)

  File "src\gevent\_abstract_linkable.py", line 114, in gevent.__abstract_linkable.AbstractLinkable._notify_links

  File "src\gevent\_abstract_linkable.py", line 148, in gevent.__abstract_linkable.AbstractLinkable._notify_links

AssertionError

2019-10-23T02:48:00Z <callback at 0x5578850 args=()> failed with AssertionError

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

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{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

一共跑68个数据

Error in atexit._run_exitfuncs:

Traceback (most recent call last):

  File "src\gevent\_abstract_linkable.py", line 169, in gevent.__abstract_linkable.AbstractLinkable._wait_core

  File "src\gevent\_greenlet_primitives.py", line 60, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch

  File "src\gevent\_greenlet_primitives.py", line 60, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch

  File "src\gevent\_greenlet_primitives.py", line 64, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch

Exception in thread ptvsd.stopping:

Traceback (most recent call last):

  File "D:\python36\Lib\threading.py", line 916, in _bootstrap_inner

    self.run()

  File "D:\test_project\venv\pytest_env\lib\site-packages\gevent\threading.py", line 177, in run

    super(Thread, self).run()

  File "D:\python36\Lib\threading.py", line 864, in run

    self._target(*self._args, **self._kwargs)

  File "c:\Users\Administrator\.vscode\extensions\ms-python.python-2019.10.41019\pythonFiles\lib\python\old_ptvsd\ptvsd\wrapper.py", line 692, in stop

    wait()

  File "c:\Users\Administrator\.vscode\extensions\ms-python.python-2019.10.41019\pythonFiles\lib\python\old_ptvsd\ptvsd\daemon.py", line 453, in wait_debugger

    lock_wait(lock, timeout)

  File "c:\Users\Administrator\.vscode\extensions\ms-python.python-2019.10.41019\pythonFiles\lib\python\old_ptvsd\ptvsd\_util.py", line 104, in lock_wait

    if not _lock_acquire(lock, timeout):

  File "c:\Users\Administrator\.vscode\extensions\ms-python.python-2019.10.41019\pythonFiles\lib\python\old_ptvsd\ptvsd\_util.py", line 113, in _lock_acquire

    return lock.acquire(timeout=timeout)

  File "D:\test_project\venv\pytest_env\lib\site-packages\gevent\thread.py", line 84, in acquire

    return BoundedSemaphore.acquire(self, blocking, timeout)

  File "src\gevent\_semaphore.py", line 100, in gevent.__semaphore.Semaphore.acquire

  File "src\gevent\_semaphore.py", line 128, in gevent.__semaphore.Semaphore.acquire

  File "src\gevent\_abstract_linkable.py", line 192, in gevent.__abstract_linkable.AbstractLinkable._wait

  File "src\gevent\_abstract_linkable.py", line 165, in gevent.__abstract_linkable.AbstractLinkable._wait_core

  File "src\gevent\_abstract_linkable.py", line 169, in gevent.__abstract_linkable.AbstractLinkable._wait_core

  File "src\gevent\_greenlet_primitives.py", line 60, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch

  File "src\gevent\_greenlet_primitives.py", line 60, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch

  File "src\gevent\_greenlet_primitives.py", line 64, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch

  File "src\gevent\__greenlet_primitives.pxd", line 35, in gevent.__greenlet_primitives._greenlet_switch

gevent.exceptions.LoopExit: This operation would block forever

        Hub: <Hub '' at 0x50f70e0 default pending=0 ref=0 thread_ident=0x6df8>

        Handles:

[HandleState(handle=<cdata 'struct uv_handle_s *' 0x06E08EA0>, type=b'check', watcher=<loop at 0x6741790 default pending=0 ref=0>, ref=0, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06C353D8>, type=b'timer', watcher=<loop at 0x6741790 default pending=0 ref=0>, ref=0, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06E08D80>, type=b'prepare', watcher=<loop at 0x6741790 default pending=0 ref=0>, ref=0, active=1,

closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06E08CC0>, type=b'check', watcher=<loop at 0x6741790 default pending=0 ref=0>, ref=1, active=0, closing=0)]

  File "src\gevent\__greenlet_primitives.pxd", line 35, in gevent.__greenlet_primitives._greenlet_switch

gevent.exceptions.LoopExit: This operation would block forever

        Hub: <Hub '' at 0x50f73a0 default default pending=0 ref=0 resolver=<gevent.resolver_thread.Resolver at 0x52ae330 pool=<ThreadPool at 0x52ae490 0/10/10 hub=<Hub at 0x50f73a0 thread_ident=0x29244>>> threadpool=<ThreadPool at 0x52ae490 0/10/10 hub=<Hub at 0x50f73a0 thread_ident=0x29244>> thread_ident=0x723c>

        Handles:

[HandleState(handle=<cdata 'struct uv_handle_s *' 0x0090E940>, type=b'check', watcher=<loop at 0x5106970 default default pending=0 ref=0>, ref=0, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x0091BB80>, type=b'timer', watcher=<loop at 0x5106970 default default pending=0 ref=0>, ref=0, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x0090E9A0>, type=b'prepare', watcher=<loop at 0x5106970 default default pending=0 ref=0>, ref=0, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x0090EB20>, type=b'check', watcher=<loop at 0x5106970 default default pending=0 ref=0>, ref=1, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x034B50A0>, type=b'async', watcher=<async_ at 0x52ae4d0 callback=<bound method ThreadPool._on_fork

of <ThreadPool at 0x52ae490 0/10/10 hub=<Hub at 0x50f73a0 thread_ident=0x29244>>> args=() watcher=<cdata 'struct uv_async_s *' owning 116 bytes> handle=<cdata 'void *' 0x052A28A0> ref=False>, ref=0, active=1, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x0088B498>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D45BF0>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D44F08>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C510>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C9B0>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C888>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8CAD8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8CC00>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C198>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8BE20>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C2C0>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8BF48>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C638>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C3E8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C760>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04D8C070>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFBE38>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFBBE8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFC400>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFC528>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFCAF0>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFC8A0>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFC2D8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x04DFCC18>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D96E40>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D96AC8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D96D18>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D95A98>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D955F8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D96188>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D95E10>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x070DD0C8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x070DC538>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x070DCC28>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x070DC9D8>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x070DC1C0>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x06D96060>, type=b'poll', watcher=None, ref=1, active=0, closing=0),

 HandleState(handle=<cdata 'struct uv_handle_s *' 0x070DDC58>, type=b'poll', watcher=None, ref=1, active=0, closing=0)]

看着报错信息，头疼。但其实呢，解决办法很简单，真的很简单。

只要一步，问题解决。 thread=False

from gevent import monkey; monkey.patch_all(thread=False)

加上thread=False在试下，结果：一切正常，没有在报错。

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

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{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

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{"code":0,"status":succes}}

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{"code":0,"status":succes}}

{"code":0,"status":succes}}

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{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

{"code":0,"status":succes}}

一共跑68个数据

需要注意的点：

1. 导入包的位置。补丁以下都会被改成阻塞。注意位止，这个坑了很多人。

比如1: 这么放执行requests请求时没有问题。

2：果断报错，原因，并没有将requests改成阻塞。

2.开启多线程时，monkey会阻止主线程执行，所以这里设置，thread=False

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