Jason Brownlee's Blog, page 27

Asynchronous Programming in Python

Asynchronous programming is a programming paradigm that does not block. Instead, requests and function calls are issued and executed somehow in the background at some future time. This frees the caller to perform other activities and handle the results of issued calls at a later time when results are available or when the caller is […]

Python Concurrency API Documentation

Python concurrency provides a number of different APIs. Although the standard library supports concurrency via coroutines, threads, and processes, there is no central location to access all of the relevant API documentation. Additionally, other Python documentation is very useful when using Python concurrency APIs, such as HowTos, Glossary, and more. In this guide, you will […]

Concurrent Programming in Python

Concurrent programming refers to a type of programming focused on executing independent tasks at the same time. Unlike traditional programming where instructions or tasks are executed one after the other, concurrent programming allows multiple tasks to make progress at the same time. It facilitates other types of programming, such as parallel programming where tasks are […]

How to Use Asyncio Streams in Python

You can use non-blocking TCP socket connections using the asyncio streams API. In this tutorial, you will discover how to use asyncio streams in Python. Let’s get started. Asyncio Streams Asyncio provides non-blocking I/O socket programming. This is provided via streams. Streams are high-level async/await-ready primitives to work with network connections. Streams allow sending and […]

How to Develop an Asyncio Port Scanner in Python

Asyncio coroutines in Python can be used to scan multiple ports on a server concurrently. This can dramatically speed up the process compared to attempting to connect to each port sequentially, one by one. In this tutorial, you will discover how to develop a concurrent port scanner with asyncio in Python. After completing this tutorial, […]

Asyncio Check Website Status Concurrently

You can query the HTTP status of websites using asyncio by opening a stream and writing and reading HTTP requests and responses. We can then use asyncio to query the status of many websites concurrently, and even report the results dynamically. In this tutorial, you will discover how to check the status of multiple web […]

How to Download a Webpage with Asyncio

You can download webpages asynchronously using asyncio in Python. In this tutorial, you will discover how to download an HTML webpage using HTTP and HTTPS using asyncio. Let’s get started. How to Download a Webpage with Asyncio The asyncio module provides support for opening socket connections and reading and writing data via streams. We can […]

Asyncio Subprocess in Python

You can manage a subprocess created in an asyncio program via the asyncio.subprocess.Process class. In this tutorial, you will discover how to use subprocesses in asyncio programs. Let’s get started. What is asyncio.subprocess.Process The asyncio.subprocess.Process class provides a representation of a subprocess run by asyncio. It provides a handle on a subprocess in asyncio programs, […]

Asyncio Subprocess With create_subprocess_exec()

You can run a command as a subprocess with asyncio via the create_subprocess_exec() function. In this tutorial, you will discover how to run commands with asyncio in Python. Let’s get started. What is Asyncio create_subprocess_exec() The create_subprocess_exec() function allows commands to be executed from asyncio. What is a Command A command is a program executed […]

Asyncio Subprocess With create_subprocess_shell()

You can run a command using a shell as a subprocess with asyncio via the create_subprocess_shell() function. In this tutorial, you will discover how to run commands using the shell with asyncio in Python. Let’s get started. What is Asyncio create_subprocess_shell() The asyncio.create_subprocess_shell() function allows commands to be executed using the shell from asyncio. What […]