Jason Brownlee's Blog, page 31

Performance May Not Scale with CPU Cores in Python

We expect the performance of executing independent tasks in parallel to scale with the number of physical CPU cores available. This assumption is true, but only with some types of tasks. There are some tasks where this expectation does not hold, such as working with large lists. In this tutorial, you will discover some independent […]

How to Get All Asyncio Tasks in Python

You can get all tasks in an asyncio program via the asyncio.all_tasks() function. In this tutorial, you will discover how to get all asyncio tasks in Python. Let’s get started. What is an Asyncio Task An asyncio Task is an object that schedules and independently runs an asyncio coroutine. It provides a handle on a […]

Parallel Nested For-Loops in Python

You can convert nested for-loops to execute concurrently or in parallel in Python using thread pools or process pools, depending on the types of tasks that are being executed. In this tutorial, you will discover how to change a nested for-loop to be concurrent or parallel in Python with a suite of worked examples. This […]

How to Get the Current Asyncio Task in Python

You can get the current task via asyncio.current_task() function. In this tutorial, you will discover how to get and use the current asyncio task in Python. Let’s get started. What is an Asyncio Task An asyncio Task is an object that schedules and independently runs an asyncio coroutine. It provides a handle on a scheduled […]

How to Get the Asyncio Coroutine from a Task in Python

You can get the coroutine wrapped in a task by calling the get_coro() method on the Task object. In this tutorial, you will discover how to get the coroutine from an asyncio task in Python. Let’s get started. What is an Asyncio Task An asyncio Task is an object that schedules and independently runs an […]

How to Use Asyncio Task Done Callback Functions

You can add a done callback function to a task via the add_done_callback() method and specify the function name. Done callback functions can be removed from a task via the remove_done_callback() method. In this tutorial, you will discover how to use asyncio task done callback functions in Python. Let’s get started. What is an Asyncio […]

How to Get and Set Asyncio Task Names

You can set an asyncio task name via the “name” argument to the asyncio.Task class constructor or via the set_name() method on a Task object. The name of a task can be accessed via the get_name() method on a Task object. In this tutorial, you will discover how to set and get the name of […]

How to Handle Asyncio Task Exceptions

You can retrieve an exception in a coroutine wrapped in a Task via the exception() method. In this tutorial, you will discover how to handle exceptions in asyncio tasks in Python. Let’s get started. What is an Asyncio Task An asyncio Task is an object that schedules and independently runs an asyncio coroutine. It provides […]

How to Cancel an Asyncio Task

You can cancel a task in asyncio via the cancel() method on a Task object. In this tutorial, you will discover how to cancel asyncio tasks in Python. Let’s get started. What is an Asyncio Task An asyncio Task is an object that schedules and independently runs an asyncio coroutine. It provides a handle on […]

How to Get Asyncio Task Results

You can get the return value result from an asyncio task by calling the result() method on the Task object. In this tutorial, you will discover how to get a result from an asyncio task in Python. Let’s get started. What is an Asyncio Task An asyncio Task is an object that schedules and independently […]