Exercises
If you haven't encountered the with
statements and context managers before, I encourage you, as usual, to go through your old code and find all the places you were opening files, and make sure they are safely closed using the with
statement. Look for places that you could write your own context managers as well. Ugly or repetitive try
...finally
clauses are a good place to start, but you may find them useful any time you need to do before and/or after tasks in context.
You've probably used many of the basic built-in functions before now. We covered several of them, but didn't go into a great deal of detail. Play with enumerate
, zip
, reversed
, any
and all
, until you know you'll remember to use them when they are the right tool for the job. ...
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