Search, Split, and Reassemble Text

Introduction

This lesson opens chapter 7 and belongs to the Strings section of PCAP-31-03 (18% of the score, 8 of the 40 items). It covers objective 3.3: the built-in string methods index(), find(), rfind(), split(), join() and strip(), together with sorted() for ordering strings. The lesson that follows adds the isxxx() character tests and builds complete input-validation pipelines.