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Async Programming in Python
Learn how to keep your Python program busy while it waits.
Imagine writing a Python script that checks three servers.
Your script sends a request to the first server and waits for a reply. Then it checks the second server. Then the third.
That works, but your program spends a lot of time waiting.
What if it could start checking another server while the first one prepares its reply?
That is the main idea behind async programming: let other work move forward while one task waits. Python provides the asyncio library to help you write this kind of code.
Let’s build that idea step by step.
What Is Async Programming?
Async is short for asynchronous. The name may sound complex, but the idea is simple.
Think about sending messages to three people.
You send the first message, but you do not wait for a reply before sending the next two. While people prepare their replies, you can keep doing other things.
Async programming follows the same approach. When an operation needs to wait, your program can run another ready task instead. This makes it useful for programs that spend time waiting for network…
