How to UPdate all Python-packages (pip) in one sweep?

Python packages installed using the package manager has the package name prefixed with python-.

Those will be updated when an update is available in the repos.

Installing packages using pip should be installed using the --user argument or as pointed out use a virtual environment.

install the package python-virtualenvwrapper - source the initializer and you are good to go.

A python editor like PyCharm can pick up your various environments or you can use the wrapper handle it