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persistence

Test Drive

Perform the edits to your code to replace your two print() calls with your new file I/O code. Then, run your
program to confirm that the data files are created:

Before your program runs,
there are no data files in
your folder, just your code.

When you run
your code, this
is all you see,
what looks like
an “empty” IDLE
shell.

After your program
runs, two new files are
CREATED in your folder.

That code worked, too. You’ve created two data files, each holding the data
from each of your lists. Go ahead and open these files in your favorite editor
to confirm that they contain the data you expect.

Consider the following carefully: what happens to
your data files if the second call to print() in
your code causes an IOError?

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