... Iterating with for Loops Chapter 6. Exceptions and File Handling In this chapter, you will dive into exceptions, file objects, for loops, and the os and sys modules. If you've used exceptions ... it because it makes it clear that what I'm doing is mapping a dictionary into a list, then joining the list into a single string. Other programmers prefer to write this out as a for loop. ... Tutorial discusses reading and writing files, including how to read a file one line at a time into a list. * eff-bot discusses efficiency and performance of various ways of reading a file....