SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:618)

[root@hadoop02 ~]# pip install happybase
Collecting happybase
Exception:
Traceback (most recent call last):
File “/usr/lib/python2.7/site-packages/pip/basecommand.py”, line 215, in main
status = self.run(options, args)
File “/usr/lib/python2.7/site-packages/pip/commands/install.py”, line 307, in run
requirement_set.prepare_files(finder)
File “/usr/lib/python2.7/site-packages/pip/req/req_set.py”, line 370, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File “/usr/lib/python2.7/site-packages/pip/req/req_set.py”, line 587, in _prepare_file
session=self.session, hashes=hashes)
File “/usr/lib/python2.7/site-packages/pip/download.py”, line 810, in unpack_url
hashes=hashes
File “/usr/lib/python2.7/site-packages/pip/download.py”, line 649, in unpack_http_url
hashes)
File “/usr/lib/python2.7/site-packages/pip/download.py”, line 842, in _download_http_url
stream=True,
File “/usr/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py”, line 487, in get
return self.request(‘GET’, url, **kwargs)
File “/usr/lib/python2.7/site-packages/pip/download.py”, line 378, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File “/usr/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py”, line 475, in request
resp = self.send(prep, **send_kwargs)
File “/usr/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py”, line 585, in send
r = adapter.send(request, **kwargs)
File “/usr/lib/python2.7/site-packages/pip/_vendor/cachecontrol/adapter.py”, line 46, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File “/usr/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py”, line 477, in send
raise SSLError(e, request=request)
SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:618)
You are using pip version 8.1.2, however version 19.1.1 is available.
You should consider upgrading via the ‘pip install --upgrade pip’ command.

解决方案：
pip更换到国内源；用-i指定为清华镜像，指令如下：
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple happybase

至此，问题解决