SSLError CERTIFICATE_VERIFY_FAILED for sampledata.download

I have bokeh 0.9.0 via Macports and wanted to download the sample data as described here: http://bokeh.pydata.org/en/latest/docs/quickstart.html#sample-data

But I’m getting this SSL CERTIFICATE_VERIFY_FAILED error on Python 2 and 3:

$ python -c "import bokeh.sampledata; bokeh.sampledata.download()"
Creating /Users/deil/.bokeh/data directory
Using data directory: /Users/deil/.bokeh/data
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 1182, in do_open
    h.request(req.get_method(), req.selector, req.data, headers)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/http/client.py", line 1088, in request
    self._send_request(method, url, body, headers)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/http/client.py", line 1126, in _send_request
    self.endheaders(body)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/http/client.py", line 1084, in endheaders
    self._send_output(message_body)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/http/client.py", line 922, in _send_output
    self.send(msg)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/http/client.py", line 857, in send
    self.connect()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/http/client.py", line 1231, in connect
    server_hostname=server_hostname)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/ssl.py", line 365, in wrap_socket
    _context=self)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/ssl.py", line 583, in __init__
    self.do_handshake()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/ssl.py", line 810, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/bokeh/sampledata/__init__.py", line 72, in download
    _getfile(base_url, file_name, data_dir, progress=progress)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/bokeh/sampledata/__init__.py", line 78, in _getfile
    url = urlopen(file_url)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 161, in urlopen
    return opener.open(url, data, timeout)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 463, in open
    response = self._open(req, data)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 481, in _open
    '_open', req)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 441, in _call_chain
    result = func(*args)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 1225, in https_open
    context=self._context, check_hostname=self._check_hostname)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 1184, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)>

$ python2.7 -c "import bokeh.sampledata; bokeh.sampledata.download()"
Using data directory: /Users/deil/.bokeh/data
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/bokeh/sampledata/__init__.py", line 71, in download
    _getfile(base_url, file_name, data_dir, progress=progress)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/bokeh/sampledata/__init__.py", line 75, in _getfile
    u = urlopen(url)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 431, in open
    response = self._open(req, data)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 449, in _open
    '_open', req)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1240, in https_open
    context=self._context)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1197, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)>

[Denisevi4]

I was able to solve this by executing the following:

import ssl ssl._create_default_https_context = ssl._create_unverified_context

[bryevdv]

@guyts That error is coming from holoviews (or possibly anaconda’s openssl package), not from bokeh. We don’t have any control over those things. You should file an issue on their GitHub issue tracker.