1.1 Resources

1.2 Installing Python

The best way to install Python is with Homebrew.

Homerbew Python Page

You can install multiple versions of Python and they won't conflict with each other.

brew install python

installs Python 2

brew install python3

installs Python 2

1.3 Running Python

to run Python 2

python

to run Python 3

python3

To run IDLE for Python 2

idle

To run IDLE for Python 3

idle3

1.4 Quick Check

@ terminal

python

now your in Python command line mode, try some math:

>>> 2+2
4

and

>>> print "Hello World"
Hello World

and

>>> exit()
✔ ~ 
16:59 $

also try...

Create a file called test.py

@ test.py

def main():
    print("It's a Function!")
 
if __name__ == "__main__":
    main()

Open your terminal in the same folder and run

python test.py

That should execute the program in Python2

python3 test.py

That should execute the program in Python3

You are ready to go!