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Advanced Python Programming

You're reading from   Advanced Python Programming Build high performance, concurrent, and multi-threaded apps with Python using proven design patterns

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Product type Course
Published in Feb 2019
Publisher Packt
ISBN-13 9781838551216
Length 672 pages
Edition 1st Edition
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Authors (3):
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Quan Nguyen Quan Nguyen
Author Profile Icon Quan Nguyen
Quan Nguyen
Sakis Kasampalis Sakis Kasampalis
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Sakis Kasampalis
Dr. Gabriele Lanaro Dr. Gabriele Lanaro
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Dr. Gabriele Lanaro
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Table of Contents (41) Chapters Close

Title Page
Copyright
About Packt
Contributors
Preface
Benchmarking and Profiling FREE CHAPTER Pure Python Optimizations Fast Array Operations with NumPy and Pandas C Performance with Cython Exploring Compilers Implementing Concurrency Parallel Processing Advanced Introduction to Concurrent and Parallel Programming Amdahl's Law Working with Threads in Python Using the with Statement in Threads Concurrent Web Requests Working with Processes in Python Reduction Operators in Processes Concurrent Image Processing Introduction to Asynchronous Programming Implementing Asynchronous Programming in Python Building Communication Channels with asyncio Deadlocks Starvation Race Conditions The Global Interpreter Lock The Factory Pattern The Builder Pattern Other Creational Patterns The Adapter Pattern The Decorator Pattern The Bridge Pattern The Facade Pattern Other Structural Patterns The Chain of Responsibility Pattern The Command Pattern The Observer Pattern 1. Appendix 2. Other Books You May Enjoy Index

Chapter 12


What is HTML?

HTML stands for Hypertext Markup Language, which is the standard and most common markup language for developing web pages and web applications.

What are HTTP requests?

Most of the communication done via the internet (more specifically, the World Wide Web) utilizes HTTP. In HTTP, request methods are used to convey information on what data is being requested and should be sent back from a server.

What are HTTP response status codes?

HTTP response status codes are three-digit numbers that signify the state of communication between a server and its client. They are sorted into five categories, each indicating a specific state of communication.

How does the requests module help with making web requests?

The requests module manages the communication between a Python program and a web server through HTTP requests.

What is a ping test and how is one typically designed?

A ping test is a tool typically used by web administrators to make sure that their sites are still available to clients. A ping test does this by making requests to the websites under consideration and analyzes the returned response status codes

Why is concurrency applicable in making web requests?

Both the process of making different requests to a web server and the process of parsing and processing downloaded HTML source code are independent across separate requests.

What are the considerations that need to be made when developing web scraping applications?

The following considerations should be made when developing applications that make concurrent web requests:

  • The terms of service and data-collecting policies
  • Error handling
  • Updating your program regularly
  • Avoiding over-scraping
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