Python Concurrency with asyncio

2 asyncio basics

This chapter covers

• The basics of async await syntax and coroutines
• Running coroutines concurrently with tasks
• Canceling tasks
• Manually creating the event loop
• Measuring a coroutine’s execution time
• Keeping eyes open for problems when running coroutines

Chapter 1 dived into concurrency, looking at how we can achieve it with both processes and threads. We also explored how we could utilize non-blocking I/O and an event loop to achieve concurrency with only one thread. In this chapter, we’ll cover the basics of how to write programs using this single-threaded concurrency model with asyncio. Using the techniques in this chapter, you’ll be able to take long-running operations, such as web requests, database queries, and network ...