This book is well suited for developers who want to write expressive, highly responsive, manageable, scalable, and resilient code in Python. Prior programming knowledge of Python is expected.

Chapter 1, Containers and Data Structures, covers less obvious cases of data structures and containers provided by the standard library. While more basic containers such as list and dict are taken for granted, the chapter will dive into less common containers and more advanced usages of the built-in containers.

Chapter 2, Text Management, covers text manipulation, string comparison, matching, and the most common needs when formatting output for text-based software.

Chapter 3, Command Line, covers how to write terminal/shell based software, parsing arguments, writing interactive shells, and implement logging.

Chapter 4, Filesystem and Directories, covers how to work with directories and files, traverse filesystems and work with multiple encoding types related to filesystems and filenames.

Chapter 5, Date and Time, covers how to parse dates and times, format them, and apply math over dates to compute past and future dates.

Chapter 6, Read/Write Data, covers how to read and write data in common file formats, such as CSV, XML, and ZIP, and how to properly manage encoding text files.

Chapter 7, Algorithms, covers some of the most common algorithms for sorting, searching, and zipping, and common operations that you might have to apply on any kind of sets of data.

Chapter 8, Cryptography, covers security-related functions that are provided by the standard library or that can be implemented with the hashing functions available in the standard library.

Chapter 9, Concurrency, covers the various concurrency models provided by the standard library, such as threads, processes, and coroutines, with a specific focus on the orchestration of those executors.

Chapter 10, Networking, covers features provided by the standard library to implement networking-based applications, how to read from some common protocols, such as FTP and IMAP, and how to implement general-purpose TCP/IP applications.

Chapter 11, Web Development, covers how to implement HTTP-based applications, simple HTTP servers, and fully-featured web applications. It will also cover how to interact with third-party software through HTTP.

Chapter 12, Multimedia, covers basic operations on detecting file types, checking images, and generating sounds.

Chapter 13, Graphical User Interfaces, covers the most common building blocks of UI-based applications that can be combined to create simple applications for desktop environments.

Chapter 14, Development Tools, covers tools provided by the standard library to help developers in their everyday work, such as writing tests and debugging software.

Readers are expected to already have prior knowledge of Python and programming. Developers that come from other languages or that are intermediate with Python will get the most out of this book.

This book takes for granted that readers have a working installation of Python 3.5+, and most of the recipes show examples for Unix-based systems (such as macOS or Linux) but are expected to work on Windows system too. Windows users can rely on the Windows subsystem for Linux to perfectly reproduce the examples.

for word in 'hello world this is a very nice day'.split():
    if word in counts:
        counts[word] += 1

class Bunch(dict):
    def __init__(self, **kwds):
        super().__init__(**kwds)
        self.__dict__ = self

>>> print(population['japan'])
127

In this book, you will find several headings that appear frequently (Getting ready,How to do it..., How it works..., There's more..., and Seealso).

To give clear instructions on how to complete a recipe, use these sections as follows:

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