python之python3.7 pypi-server:SSLCertVerificationError:[SSL:CERTIFICATE_VERIFY_FAILED]证书验证失败:无法获取本地发行者证书

我想将我的博客（基于python3.7和django2.0）部署到服务器（centos6。）中，并制作了一个虚拟环境（基于python3.7）。安装pypi-sever后，我在终端中运行pypi-server来测试它是否有效。不幸的是，该命令不起作用。我发现了许多方法，包括update openssl，setuptools等，但是它们不起作用。

谁能建议我还能尝试什么？

    (pypi-env3) [root@edward pypi-env3]# pypi-server 
[I 181029 20:18:20 __init__:29] Opening sqlite database: /root/virtual_path/pypi-env3/packages/metadata.db 
[I 181029 20:18:20 __init__:35] Database initialized as '/root/virtual_path/pypi-env3/packages/metadata.db'. Checking migrations... 
[I 181029 20:18:20 server:165] Init thread pool with 6 threads 
[I 181029 20:18:20 server:194] Starting server http://127.0.0.1:8080/ 
[W 181029 20:18:25 iostream:1332] SSL Error on 9 ('151.101.108.223', 443): [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045) 
[E 181029 20:18:25 ioloop:638] Exception in callback functools.partial(<function wrap.<locals>.null_wrapper at 0x7fc60131ad08>, <tornado.concurrent.Future object at 0x7fc6013928d0>) 
    Traceback (most recent call last): 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/ioloop.py", line 605, in _run_callback 
        ret = callback() 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/stack_context.py", line 277, in null_wrapper 
        return fn(*args, **kwargs) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/ioloop.py", line 626, in _discard_future_result 
        future.result() 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/concurrent.py", line 238, in result 
        raise_exc_info(self._exc_info) 
      File "<string>", line 4, in raise_exc_info 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 1063, in run 
        yielded = self.gen.throw(*exc_info) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/pypi_server/cache.py", line 194, in wrap_gen 
        f = gen.throw(e) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/pypi_server/handlers/pypi/proxy/client.py", line 49, in packages 
        (yield cls.XMLRPC.list_packages()) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/pypi_server/cache.py", line 189, in wrap_gen 
        res = yield f 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 1055, in run 
        value = future.result() 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/concurrent.py", line 238, in result 
        raise_exc_info(self._exc_info) 
      File "<string>", line 4, in raise_exc_info 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 1063, in run 
        yielded = self.gen.throw(*exc_info) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado_xmlrpc/client.py", line 111, in _remote_call 
        response = yield self.client.fetch(req) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 1055, in run 
        value = future.result() 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/concurrent.py", line 238, in result 
        raise_exc_info(self._exc_info) 
      File "<string>", line 4, in raise_exc_info 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/stack_context.py", line 316, in wrapped 
        ret = fn(*args, **kwargs) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 289, in <lambda> 
        future, lambda future: callback(future.result())) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/concurrent.py", line 238, in result 
        raise_exc_info(self._exc_info) 
      File "<string>", line 4, in raise_exc_info 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 1063, in run 
        yielded = self.gen.throw(*exc_info) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/tcpclient.py", line 189, in connect 
        server_hostname=host) 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/gen.py", line 1055, in run 
        value = future.result() 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/concurrent.py", line 238, in result 
        raise_exc_info(self._exc_info) 
      File "<string>", line 4, in raise_exc_info 
      File "/root/virtual_path/pypi-env3/lib/python3.7/site-packages/tornado/iostream.py", line 1315, in _do_ssl_handshake 
        self.socket.do_handshake() 
      File "/usr/local/lib/python3.7/ssl.py", line 1108, in do_handshake 
        self._sslobj.do_handshake() 
    ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045) 

请您参考如下方法:

我不知道您使用的是哪个模块，但是我遇到了ssl.SSLCertVerificationError错误：[SSL：CERTIFICATE_VERIFY_FAILED]证书验证失败：也无法获取本地发行者证书（_ssl.c：1045）。这是我对导入的库请求的处理

try: 
    req = requests.get(i, headers=headers) 
    text = req.text 
except requests.exceptions.SSLError as error: 
    print("SSL request error.", i) 
    pass