pip ignores proxy settings except ones defined in environment variables

Environment

• pip version: 20.1.1
• Python version: 3.7.9
• OS: Windows 10

Clean installed OS with official python binaries.

Description

I have a clean Windows 10 OS with installed offical python==3.7.9 binaries. When I tried to install packages via pip, I encountered problem with proxy settings which was written in pip.ini, that pip seems to be ignore it. I also tried to pass config with corresponding --proxy option, but similarly it do not affected to pip’s behavior. Only proxy settings written to HTTP_PROXY or HTTPS_PROXY evs was accepted.

Expected behavior

To be able download a packages from pypi if proxy settings well defined in any source which were pointed in documentation.

How to Reproduce

1. Preferibly have a clean OS install behind proxy.
2. Download python binaries installer (In my case 3.7.9)
3. Install it with “add to PATH” option checked.
4. In %APPDATA% directory make folder called pip
5. create pip.ini inside it and define your proxy settings as described in documentation.
6. run pip config list to ensure that your configs have been read succesfully.
7. run pip install <package> without setting HTTP_PROXY or HTTPS_PROXY environment variables.
8. try to directly pass config with --proxy option.

Output

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy authentication required'))': /simple/numpy/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy authentication required'))': /simple/numpy/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy authentication required'))': /simple/numpy/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy authentication required'))': /simple/numpy/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy authentication required'))': /simple/numpy/

[ByteJuggler]

In Powershell, you can also just use the following to temporarily set up env variables in the running shell: $env:HTTP_PROXY=“http://proxy.details” $env:HTTPS_PROXY=“http://proxy.details”

On Thu, 16 Jun 2022 at 15:46, Thiago @.***> wrote:

First I would like to point out that for pip >= 22.1 the --proxy keyword should be working as a result of this merge https://github.com/pypa/pip/pull/10680.

@kevingoos https://github.com/kevingoos Be careful with set HTTP_PROXY in PowerShell it DOES NOT WORK as in the CMD. Instead you should use [System.Environment]::SetEnvironmentVariable("HTTPS_PROXY ", “your_proxy”)

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[stonecharioteer]

@danielhrisca unless you’re in a corporate network with proxies being needed.