The setdefault() method returns the value of the item with the specified key. If the key does not exist, insert the key, with the specified value, see example below. Required. The keyname of the item you want to return the value from. Optional. If the key exist, this parameter has no effect. Dictionary Methods. When you set Chrome as your default browser, links open automatically in Chrome. In some countries, you may be asked to choose your default browser. You can change your default browser. If you haven't already assigned a default app, you'll see a list of apps, and two options: Browse apps in the Microsoft Store and Choose an app on your PC. Select which one you want to use from now on, and click Always. Once you're on the Default Apps screen, there are several different ways to change your default app settings. We'll go over two of them in different sections below. In this post, we will show you how to change default Sound Output Device in Windows 11 and Windows 10. Using this tutorial, you can easily switch between Headphones and Speakers in Windows 11/10. In Windows 11 and Windows 10, the safest way to set or change default programs is through Settings Apps Default apps. From there, you can choose defaults by app, by file type, or by link type, depending on whether you want a broad change or a very specific one. Return the value of a specified key if it exists. If the key does not exist, it adds the key with a default value and returns that default. It’s a handy method for setting default values while avoiding overwriting existing ones. For example: suppose we're tracking student attendance in a dictionary. Discover how to easily change default apps in Windows 11 with our step-by-step guide. Personalize your experience by setting preferred apps for tasks. Unlock a smoother Windows 10 experience! Our step-by-step guide empowers you to effortlessly set default programs, ensuring your files always open with the right app. This article explains how to change default apps in Windows using the Settings app. Users can assign apps by file type, protocol, or application to control how files and links open. It highlights setting a default browser and customizing app associations for productivity.