Implements a command-line Tic Tac Toe game in Python 3, with some automated game play.

Default play mode is human (X) vs computer(O) you play the computer, but it provides an option for taking out the automated game play.

This code grew out of the programming task I chose for the Recurse Center. That task asked to upload a single file, and I will keep that constraint for now. Therefore, I will keep most discussion of the code choices in the file itself. The code is commented for this use case.

python3 tic_tac_toe.py

This is a command-line game, and we assume a dark terminal background. You can change the display to accommodate lighter backgrounds by setting an OS environment variable: TTT_DISPLAY_MODE. Probably the best way to do this is to use the command prefix option:

TTT_DISPLAY_MODE=light ./python3 tic_tac_toe.py

Any value other than dark (case-insensitive) will enable light-mode.

By default, we assume you want to play the computer. If you'd like to play another human or yourself set the TTT_USE_AI environment variable.

TTT_USE_AI=false ./python3 tic_tac_toe.py

Any value other than true (case-insensitive) will enable two-player mode.

To test, install pytest (in the requirements) and simply run pytest tests.py at the project root. The tests include a test to ensure the primary automated logic will always result in a tie. Global thermonuclear war avoided!.