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I am not able to install any packages using pip. I'm behind a corporate proxy which is configured using a proxy script. The proxy file is in the format described on Wikipedia.

OS: Windows 10 Enterprise 64-bit
Python version: 3.7.4
Pip version: 19.0.3

After reading through various other questions here on stackoverflow, I've tested different kinds of options, some of which result in different errors:

  1. No extra options:
pip install scipy --verbose

Collecting scipy
  1 location(s) to search for versions of scipy:
  * https://pypi.org/simple/scipy/
  Getting page https://pypi.org/simple/scipy/
  Looking up "https://pypi.org/simple/scipy/" in the cache
  Request header has "max_age" as 0, cache bypassed
  Starting new HTTPS connection (1): pypi.org:443
  Incremented Retry for (url='/simple/scipy/'): Retry(total=4, connect=None, read=None, redirect=None, status=None)
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x068AD410>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/scipy/
  1. Setting the proxy to setting to point to the config file:
pip install scipy --verbose --proxy http://<redacted>.com/proxy.pac

Collecting scipy
  1 location(s) to search for versions of scipy:
  * https://pypi.org/simple/scipy/
  Getting page https://pypi.org/simple/scipy/
  Looking up "https://pypi.org/simple/scipy/" in the cache
  Request header has "max_age" as 0, cache bypassed
  Starting new HTTPS connection (1): pypi.org:443
  Incremented Retry for (url='/simple/scipy/'): Retry(total=4, connect=None, read=None, redirect=None, status=None)
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1076)'))': /simple/scipy/
  1. Setting the trusted hosts as suggested for example here
pip install scipy --proxy http://<redacted>.com/proxy.pac --verbose --trusted-host files.pythonhosted.org --trusted-host pypi.org --trusted-host pypi.python.org

...gets me the same result as before in attempt 2. How to proceed? The SSL error is strange and I don't know what to do next.

Plebala
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1 Answers1

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So, I solved this a bit before asking. The solution is simple:

Take the first (default) proxy from the proxy.pac file and use that as the input to pip's proxy option.

Plebala
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