5.1 "The Greps of Wrath"
This chapter continues our exploration of systems programming case
studies. Here, the focus is on Python scripts that perform more
advanced kinds of file and directory processing. The examples in this
chapter do system-level tasks such as converting files, comparing and
copying directories, and searching files and directories for
strings -- a task idiomatically known as "grepping."
Most of the tools these scripts employ were introduced in Chapter 2. Here, the goal is to show these tools in
action, in the context of more useful and realistic programs. As in
the prior chapter, learning about Python programming techniques such
as OOP and encapsulation is also a hidden subgoal of most of the
examples presented here.