CERTIFICATE_VERIFY_FAILED Python 3.6 mac osx can't fix with 'Install Certificates.command'

Question

I am aware of the update in Python 3.6 where you need to run the 'Install Certificates.command' in order to get SSL working again, however it doesn't seem to work for me.

Running the file results in:

 -- pip install --upgrade certifi
 Requirement already up-to-date: certifi in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (2018.4.16)
  -- removing any existing file or link
  -- creating symlink to certifi certificate bundle
  -- setting permissions
  -- update complete

And I've also explicitly run

pip3 install certifi
Requirement already satisfied: certifi in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (2018.4.16)

Yet when I try to run my application (using suds-py3) I get the following:

Traceback (most recent call last):
  File "./get_docs.py", line 38, in <module>
    session = Client(url_SessionWebService)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/client.py", line 111, in __init__
    self.wsdl = reader.open(url)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/reader.py", line 151, in open
    d = self.fn(url, self.options)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/wsdl.py", line 135, in __init__
    d = reader.open(url)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/reader.py", line 78, in open
    d = self.download(url)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/reader.py", line 94, in download
    fp = self.options.transport.open(Request(url))
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/transport/http.py", line 174, in open
    return HttpTransport.open(self, request)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/transport/http.py", line 63, in open
    return self.u2open(u2request)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/suds/transport/http.py", line 119, in u2open
    return url.open(u2request, timeout=tm)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 532, in open
    response = meth(req, response)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 642, in http_response
    'http', request, response, code, msg, hdrs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 564, in error
    result = self._call_chain(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 756, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 526, in open
    response = self._open(req, data)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 544, in _open
    '_open', req)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 1361, in https_open
    context=self._context, check_hostname=self._check_hostname)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 1320, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)>

I've also tried adding the following to bypass:

import ssl
ssl._create_default_https_context = ssl._create_unverified_context

But the resulting call seems to indicate that the request was not authenticated

Any suggestions on how to further debug this?

Answer 1

I have just solved the problem in my side: to install certifi do this:

python3 -m pip install --upgrade certifi --trusted-host pypi.org --trusted-host files.pythonhosted.org

You just copy and paste that command in your Mac terminal or any IDE terminal such as Visual Studio code.