Python Programming
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Python Essentials › Text ProcessingChapter 4Working with Text and Real Projects
Cut, clean and count text. Then build real tools that use everything in this book.
Part of Python Programming · Essentials (chapter 4)
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Working with Text
Real text is messy: capital letters, extra spaces, punctuation, lines that arrive in a strange form. Most programs spend much of their time reading, cleaning and cutting text. In this course you cut text with split, glue it with join, clean it with strip, lower and replace, count the words with a dictionary, write and break a secret code, and check palindromes and anagrams. A lesson on looking inside text shows how to find a piece, test the kind of characters, and read a line such as name equals value. A text toolkit with a table of tests is the project at the end. The practice runs your functions on messy inputs and tells you which ones fail.
Three Essentials Projects
Real tools are made of the small ideas that you already know, put together with care. In this course you plan and build three tools: a contact book that uses a dictionary and try and except, a code cracker that counts letters and uses the shift of a Caesar code, and a marks report that uses the statistics module, sorting and binary search. Each project starts with a plan and a table of expected answers, keeps the thinking in small functions, and ends with ideas for you to extend. A lesson on a command menu joins tools into one program that reads commands, and a last lesson gives a method for planning your own project and shows what comes next. The practice tests your functions on many cases and tells you which ones fail.