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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