Introduction

In Chapter 3, Executing Python – Programs, Algorithms, and Functions, you covered the basics of Python programs and learned how to write algorithms, functions, and programs. Now, you will learn how to make your programs more relevant and usable in the IT world.

First, in this chapter, you are going to look at file operations. File operations are essential for scripting for a Python developer, especially when you need to process and analyze a large number of files, like in data science. In companies that deal with data science, you often do not have direct access to a database, stored on a local server or a cloud server. Rather, we receive files in text format. These include CSV files for column data, and txt files for unstructured data (such as patient logs, news articles, user comments, etc.).

In this chapter, you will also cover error handling. This prevents your programs from crashing and also does its best to behave elegantly when encountering unexpected...