Could not install packages due to an EnvironmentError: [Errno 13]

If you want to use python3+ to install the packages you need to use pip3 install package_name

And to solve the errno 13 you have to add --user at the end

pip3 install package_name --user

EDIT:

For any project in python it's highly recommended to work on a Virtual enviroment, is a tool that helps to keep dependencies required by different projects separate by creating isolated python virtual environments for them.

In order to create one with python3+ you have to use the following command:

virtualenv enviroment_name -p python3

And then you work on it just by activating it:

source enviroment_name/bin/activate

Once the virtual environment is activated, the name of your virtual environment will appear on left side of terminal. This will let you know that the virtual environment is currently active. Now you can install dependencies related to the project in this virtual environment by just using pip.

pip install package_name

Regarding the permissions command, try using sudo in front of your terminal command:

sudo pip install --upgrade pip

Sudo allows you to run the command with the privileges of the superuser and will install the package for the global, system-wide Python installation. Ideally, you should create a virtual environment for the project you are working on. Have a look at this

Regarding the python Try running pip as an executable like this:

python3.6 -m pip install <package>

I was making the same mistakes then I realized that I have created my virtual environment as root user. It was write protected, so please check whether your virtual environment is write protected. make a new venv and try again