possible errors in WSL when running python3 -m pip

[nobodhi]

In this step:

python3 -m pip install flask

You may encounter an error such as this:

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f655471da30>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask/

When researching this problem you may get led down several rabbit holes, none of which are particularly productive on WSL Ubuntu. (Warning: on WSL do not try editing resolv.conf, that file is a symbolic link and modifying it is a can of worms). Unless you are running an aftermarket firewall, the likely solution is to simply re-install pip:

sudo apt -y purge python3-pip
sudo python3 -m pip uninstall pip
sudo apt -y install python3-pip --fix-missing

H/T - microsoft/WSL#4020

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Document Details

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• ID: 23257172-281d-1069-0db2-d63d72d3d8cc
• Version Independent ID: 0810ba9a-254a-073a-8a86-a5f750fe9ae4
• Content: Web development with Python on Windows
• Content Source: hub/python/web-frameworks.md
• Product: dev-environment
• Technology: windows-python
• GitHub Login: @mattwojo
• Microsoft Alias: mattwoj

[mattwojo]

Thanks for posting this issue @josebrwn. Sorry for my slowness getting to it, but it's on my list to add this to a troubleshooting section of the docs. I'll post an update once it's in.

[mattwojo]

Thanks again for this @josebrwn - finally got it added to the FAQ. Your contributions are really appreciated. Closing - resolved with https://github.com/MicrosoftDocs/windows-uwp-pr/pull/1111

[corneliusroemer]

I got a similar but slightly different error just now after installing conda. In my case I got Errno -2 "Name or service not known".

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f81caa39bb0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/qiskit/

It was enough to update/upgrade the distribution (WSL Ubuntu).

[xuancong84]

I also encounter the same error as @corneliusroemer using WSL2, so pip cannot install anything, totally broken:

Requirement already satisfied: pip in /home/ubuntu/miniconda3/lib/python3.9/site-packages (21.2.4)
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fbd3e3d1dc0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fbd3e3d1280>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fbd3e3d1610>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fbd3e3d1430>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fbd3e3d1250>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/

[PortugalNeto]

Hey guys, do you have encoutered any solutions for this issue?
@xuancong84

My problem is when I use wsl and the error is as follow:

Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f767f07bb38>: Failed to establish a new connection: [Errno 101] Network is unreachable',)': /simple/pip/

[xuancong84]

@PortugalNeto Anaconda's python -m pip install works while Miniconda's python -m pip install does not work. So you can install your package using Anaconda first, then copy over the package folder to Miniconda.