Files and IO

Part of the Python course

A program that only prints to the terminal forgets everything the moment it finishes. The next step, and the one that makes Python suddenly feel useful, is teaching it to read from and write to files on disk. In this lesson you will open a file, write some lines into it, read them back, and learn the small handful of patterns that cover almost every file job you will ever do.

There is no main.py in your lesson folder yet. Create it with this program: press Play on the block and the file is made for you. Pressing Play again does not make a second copy. ...