... (usually with the command python3 ), and how to edit a Python file and run it. Again, have a look at the 3 books I recommend above if you’re in any doubt.if you already have Python 2 installed, and ... have one command to launch Python 3 (python3 ), and anotherto launch Python 2 (usually, just python) . Similarly, when we installpip for Python 3, we just make sure that its command (pip3 orpip-3.3) ... to install Python3 and pip-3.3 with one simple com‐mand:brew install python3 Similarly to windows, the test for all this is that you should be able to open a terminal and just run python3 from...