Python WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None))

Question

I'm trying to do pip install --upgrade pip and keep
getting this error:

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnection
Error('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000026F50B448C8>: Failed to establish a new connection: [WinError 10061] No connection could be made
 because the target machine actively refused it'))': /simple/pytest/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnection
Error('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000026F50B59148>: Failed to establish a new connection: [WinError 10061] No connection could be made
 because the target machine actively refused it'))': /simple/pytest/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnection
Error('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000026F50B596C8>: Failed to establish a new connection: [WinError 10061] No connection could be made
 because the target machine actively refused it'))': /simple/pytest/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnection
Error('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000026F50B595C8>: Failed to establish a new connection: [WinError 10061] No connection could be made
 because the target machine actively refused it'))': /simple/pytest/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnection
Error('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000026F50B5F2C8>: Failed to establish a new connection: [WinError 10061] No connection could be made
 because the target machine actively refused it'))': /simple/pytest/
ERROR: Could not find a version that satisfies the requirement pytest
ERROR: No matching distribution found for pytest

Also, I can't install any new package due to this error.
I tried to reinstall Pycharm but no luck there.
I tried some other suggested solutions online - still no luck.
I understand it has something to do with Proxy but I am not familiar with it, Anyone?

Answer 1

Try appending your build command with --network=host
Eg : docker build -t cointainer_name . --network=host

If you use the host network mode for a container, that container’s network stack is not isolated from the 
Docker host (the container shares the host’s networking namespace), and the container does not 
get its own IP-address allocated. 
For instance, if you run a container which binds to port 80 and you use host 
networking, the container’s application is available on port 80 on the host’s IP address.

Check here for more details

Answer 2

TL;DR for Windows, this works for me.

1. Windows + I (to open Settings).
2. Choose Network & Internet
3. Choose Proxy
4. Check Manual proxy setup to be in the Off-position

---all starts to work here already---

5. Note: Automatically detect settings switched to On or to Off cause no influence for me (all still continue to work as it started to work after 4.).

Pre-story

I had the same error. Can't install libs by pip, by pipenv, by anaconda, by PyCharm. Then I checked Proxy setting (Windows 11 OS) and noticed I have some Manual proxy setup defined. When disable it - the problem was fixed.

The problem began very spontaneously: I did some python-work, did some installations (maybe some pithon-module with pipenv like notebook or jupyter-lab, cygwin tool etc.) and then installing/updating of the python-modules was crashed. Maybe some installations changed the proxy-parameters? I don't know.
Python re-installing didn't help.

Errors examples

For example, anaconda error while installing/updating looks like:

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://repo.anaconda.com/pkgs/main/win-64/current_repodata.json>
Elapsed: -

An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.

If your current network has https://www.anaconda.com blocked, please file
a support request with your network engineering team.

'https://repo.anaconda.com/pkgs/main/win-64'

Pip error while installing/updating looks like:

pip install --upgrade pip

>>>
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', FileNotFoundError(2, 'No such file or directory'))': /simple/pip/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', FileNotFoundError(2, 'No such file or directory'))': /simple/pip/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', FileNotFoundError(2, 'No such file or directory'))': /simple/pip/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', FileNotFoundError(2, 'No such file or directory'))': /simple/pip/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', FileNotFoundError(2, 'No such file or directory'))': /simple/pip/