blog.csdn.net/A156348933/…
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.ssl_ (D:\\MyCode\\yiqiubook\\YiQiuBook\\env\\lib\\site-packages\\urllib3\\util\\ssl_.py)', 'urllib3.util (D:\\MyCode\\yiqiubook\\YiQiuBook\\env\\lib\\site-packages\\urllib3\\util\\__init__.py)'].
curious_george.patch_all(thread=False, select=False)
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解决办法，在项目启动的第一个文件第一行写上import grequests，先导入，然后后续其他文件需要使用的时候就不会报错了。
错误二
使用调试服务器(即app.run()启动)时报错
greenlet.error: cannot switch to a different thread
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解决办法添加参数threaded=False
app.run(host='0.0.0.0',port=80, threaded=False)
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原文链接：https://blog.csdn.net/A156348933/article/details/86487130
