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Chapter 13. Controlling Execution

Python directly exposes many of the mechanisms it uses internally. This helps you understand Python at an advanced level, and means you can hook your own code into such documented Python mechanisms and control those mechanisms to some extent. For example, Chapter 7 covered the import statement and the way Python arranges for built-ins to be made implicitly visible. This chapter covers other advanced techniques that Python offers for controlling execution, while Chapter 17 covers execution-control possibilities that apply specifically to the three crucial phases of development: testing, debugging, and profiling.

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