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programming toolbox

Your Programming Toolbox

You’ve got Chapter 4 under your belt.
CHAPTER 4 in this chapter:
Let’s look back at what you’ve learned

Programming T ools

* files - reading data stored on disk Python T ools
* arrays - a collection variable that holds
multiple data items that can be accessed by

* open() - open a file for processing
* sorting - arranging a collection in a specific
index * close() - close a file

order * for - iterate over something

* string.split() - cut a string into multiple
parts
* [] - the array index operator

* array.append() - add an item to the end of
an array

* array.sort() - sort an array, lowest-to-
highest

* array.reverse() - change the order of an
array by reversing it

144 Chapter 4