4.1 Python Program Structure
By way of introduction, let's first get a clear
picture of how this chapter fits into the overall Python picture.
From a more concrete perspective, Python
programs
can be decomposed into modules, statements, expressions, and
objects, as follows:
Programs are composed
of modules. Modules contain statements. Statements contain expressions. Expressions create and process objects.
We introduced the highest level of this hierarchy when we learned
about modules in Chapter 3. This
part's chapters begin at the bottom, exploring both
built-in objects, and the
expressions you can code to use them.
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