SSL error doesn't give details of the actual URL that is faiing

[pfmoore]

I'm getting SSL errors when trying to install colorama. Unfortunately, the error reported by pip doesn't give me any clues as to what URL is causing the issue:

>pip wheel colorama
Collecting colorama
Exception:
Traceback (most recent call last):
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 544, in urlopen
    body=body, headers=headers)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 341, in _make_request
    self._validate_conn(conn)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 761, in _validate_conn
    conn.connect()
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\connection.py", line 238, in connect
    ssl_version=resolved_ssl_version)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\util\ssl_.py", line 279, in ssl_wrap_socket
    return context.wrap_socket(sock, server_hostname=server_hostname)
  File "C:\Apps\Python34\lib\ssl.py", line 365, in wrap_socket
    _context=self)
  File "C:\Apps\Python34\lib\ssl.py", line 583, in __init__
    self.do_handshake()
  File "C:\Apps\Python34\lib\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 "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\adapters.py", line 370, in send
    timeout=timeout
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\packages\urllib3\connectionpool.py", line 574, in urlopen
    raise SSLError(e)
pip._vendor.requests.packages.urllib3.exceptions.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 "C:\Apps\Python34\lib\site-packages\pip\basecommand.py", line 211, in main
    status = self.run(options, args)
  File "C:\Apps\Python34\lib\site-packages\pip\commands\wheel.py", line 194, in run
    if not wb.build():
  File "C:\Apps\Python34\lib\site-packages\pip\wheel.py", line 705, in build
    self.requirement_set.prepare_files(self.finder)
  File "C:\Apps\Python34\lib\site-packages\pip\req\req_set.py", line 334, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "C:\Apps\Python34\lib\site-packages\pip\req\req_set.py", line 321, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "C:\Apps\Python34\lib\site-packages\pip\req\req_set.py", line 491, in _prepare_file
    session=self.session)
  File "C:\Apps\Python34\lib\site-packages\pip\download.py", line 825, in unpack_url
    session,
  File "C:\Apps\Python34\lib\site-packages\pip\download.py", line 673, in unpack_http_url
    from_path, content_type = _download_http_url(link, session, temp_dir)
  File "C:\Apps\Python34\lib\site-packages\pip\download.py", line 857, in _download_http_url
    stream=True,
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 477, in get
    return self.request('GET', url, **kwargs)
  File "C:\Apps\Python34\lib\site-packages\pip\download.py", line 373, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 465, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 594, in send
    history = [resp for resp in gen] if allow_redirects else []
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 594, in <listcomp>
    history = [resp for resp in gen] if allow_redirects else []
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 196, in resolve_redirects
    **adapter_kwargs
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\sessions.py", line 573, in send
    r = adapter.send(request, **kwargs)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\cachecontrol\adapter.py", line 46, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "C:\Apps\Python34\lib\site-packages\pip\_vendor\requests\adapters.py", line 431, in send
    raise SSLError(e, request=request)
pip._vendor.requests.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)

The issue was actually a custom index URL I'd forgotten I had set up, and digging in the -v output gave me the clue I needed. But pip should report failed URL access in a more user friendly manner.

[dstufft]

Closing this, it appears to be fixed:

root@e6d73c257579:/# pip install --no-index --find-links=https://financialcryptography.com requests
Collecting requests
  Could not fetch URL https://financialcryptography.com: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) - skipping
  Could not find a version that satisfies the requirement requests (from versions: )
No matching distribution found for requests