Python PIP Install throws TypeError: unsupported operand type(s) for -=: 'Retry' and 'int'

Question

Ubuntu comes with a version of PIP from precambrian and that's how you have to upgrade it if you do not want to spend hours and hours debugging pip related issues.

apt-get remove python-pip python3-pip
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py
python3 get-pip.py

As you observed I included information for both Python 2.x and 3.x

If you are behind a proxy, you must do some extra configuration steps before starting the installation. You must set the environment variable http_proxy to the proxy address. Using bash this is accomplished with the command

export http_proxy="http://user:[email protected]:port/" 

You can also provide the

--proxy=[user:pass@]url:port 

parameter to pip. The [user:pass@] portion is optional.

Updating setuptools has worked out fine for me.

sudo pip install --upgrade setuptools

First of all, this problem exists because of network issues, and uninstalling and re-installing everything won't be of much help. Probably you are behind proxy, and in that case you need to set proxy.

But in my case, I was facing the problem because I wasn't behind proxy. Generally, I work behind proxy, but when working from home, I set the proxy to None in Network settings.

But I was still getting the same errors even after removing the proxy settings.

So, when I did type

env | grep proxy

I found something like this :

http_proxy=http://127.0.0.1:1234/

And this was the reason I was still getting the very same error, even when I thought I had removed the proxy settings.

To unset this proxy, type

unset http_proxy

Follow the same approach for all the other entries, such as https_proxy.