Error Message: MonkeyPatchWarning: Monkey-patching ssl after ssl has already been imported may lead to errors, including RecursionError on Python 3.6. It may also silently lead to incorrect behaviour on Python 3.7. Please monkey-patch earlier. See https://github.com/gevent/gevent/issues/1016. Modules that had direct imports (NOT patched): [‘urllib3.util (D:\\py\\venv\\lib\\site-packages\\urllib3\\util\\__init__.py)’, ‘urllib3.util.ssl_ (D:\\py\\venv\\lib\\site-packages\\urllib3\\util\\ssl_.py)’]. monkey.patch_all()Original codes:

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import requests
import gevent

from urllib import request
import sys

from gevent import monkey

monkey.patch_all()
sys.setrecursionlimit(10000)

from requests.packages.urllib3.util.ssl_ import create_urllib3_context

create_urllib3_context()


def task(method, url, req_kwargs):
    print(method, url, req_kwargs)
    response = requests.request(method=method, url=url, **req_kwargs)
    print(response.url, response.content)


# ##### Send request #####
gevent.joinall([
    gevent.spawn(task, method='get', url='https://www.python.org/', req_kwargs={}),
    gevent.spawn(task, method='get', url='https://www.yahoo.com/', req_kwargs={}),
    gevent.spawn(task, method='get', url='https://github.com/', req_kwargs={}),
])

# ##### Sending requests (the concurrent pool controls the maximum number of concurrent processes) #####
# from gevent.pool import Pool
# pool = Pool(None)
# gevent.joinall([
#     pool.spawn(fetch_async, method='get', url='https://www.python.org/', req_kwargs={}),
#     pool.spawn(fetch_async, method='get', url='https://www.yahoo.com/', req_kwargs={}),
#     pool.spawn(fetch_async, method='get', url='https://www.github.com/', req_kwargs={}),
# ])

Amend to read:

import gevent

from urllib import request
import sys

from gevent import monkey

monkey.patch_all()
import requests
sys.setrecursionlimit(10000)

from requests.packages.urllib3.util.ssl_ import create_urllib3_context

create_urllib3_context()

ok