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Python: Add a coroutine to an already running event loop

Updated: Aug 10, 2023
This concise, exampled-base article walks you through some different ways to add a coroutine to an already running event loop in Python. Using the asyncio.loop.create_task() method This approach uses the loop.create_task() method,......

Python asyncio.run_coroutine_threadsafe() function (with examples)

Updated: Aug 10, 2023
This succinct, example-based article is about the asyncio.run_coroutine_threadsafe() function in Python. The fundamentals asyncio.run_coroutine_threadsafe() was added to the Python programming language in version 3.4.4. The function......

Python asyncio.loop.create_server() method (with examples)

Updated: Aug 10, 2023
This succinct, straight-to-the-point article is about the asyncio.loop.create_server() method in Python. The Fundamentals The asyncio.loop.create_server() method was added to the Python standard library in version 3.4, as part of......

Python: Using aiohttp to crawl webpages asynchronously

Updated: Aug 08, 2023
This concise, code-centric article will show you how to asynchronously crawl a single or a list of webpages by using aiohttp and BeautifulSoup 4 in Python. Overview async/await async/await is a way of writing asynchronous code in......

Python asyncio.Semaphore class (with examples)

Updated: Aug 07, 2023
This succinct, practice-oriented article is about the asyncio.Semaphore class in Python. The Fundamentals The asyncio.Semaphore class is used to implement a semaphore object for asyncio tasks. A semaphore is a synchronization......

Python asyncio.as_completed() function (with examples)

Updated: Aug 07, 2023
In this concise and code-centric article, you’ll learn about the asyncio._as_completed() function in Python (Python 3.4 or newer is required). Overview The asyncio.as_completed() function is used to run a collection of tasks......

Python asyncio.create_task() function (with examples)

Updated: Aug 07, 2023
This concise, example-oriented article is about the asyncio.create_task() function in Python. Overview asyncio.create_task() is a high-level function that was added to Python in version 3.7. The function is used for running......

Python asyncio.loop.run_until_complete() function (with examples)

Updated: Aug 04, 2023
This pithy, straight-to-the-point article is about the asyncio.loop.run_until_complete() method in modern Python programming (with async/await). Overview The asyncio.loop.run_until_complete() method was added to Python in version......

Python SyntaxError: ‘await’ outside async function

Updated: Aug 04, 2023
This concise article is about a common error you might run into when writing asynchronous code in Python: SyntaxError: 'await' outside async function Understanding the Problem await is used in an async function or method to wait......

Python asyncio: Run a task at a certain time every day (2 examples)

Updated: Aug 04, 2023
By using Python, you can build a small (or large) system that can automatically do some monotonous and repetitive tasks at a certain time every day (maybe at midnight, when you’re sleeping), such as backing up files or databases,......

Python: Using the result returned by an async function (4 examples)

Updated: Aug 03, 2023
This pithy, example-based article will walk you through several different ways to use the result returned by an async function in Python. Using the asyncio.run() function directly You can call the asyncio.run() function to execute......

Python: Schedule events with sched.scheduler class (3 examples)

Updated: Aug 03, 2023
This succinct, example-based article is about the sched.scheduler class in Python, which can be super helpful for automation systems. The Fundamentals The sched module was added to Python in version 1.5.2, which was released on......