These steps ensure you're starting with working code. This tutorial features the following steps: The app has already migrated frameworks from webapp2 to Flask-completed in the Module 1 codelab-but with its Datastore usage intact. The Module 1 Python 2 sample app utilizes the Datastore bundled service via App Engine NDB. While migrating away from bundled services isn't required any more, doing so gives you more portability and flexibility in terms of where your apps can be hosted, including shifting to platforms which may better serve your workloads, or simply staying on App Engine while upgrading to a more modern language release as just described. The goal is to get your apps running on the latest runtimes, allowing you to then migrate from bundled services to Cloud standalone equivalents or 3rd-party alternatives on your own timelines, rather than having it be a blocker to a 3.x upgrade. This codelab demonstrates the necessary changes for you to upgrade your app to Python 3 while preserving use of bundled services. While this release does not include all the services available in the original runtimes, major players such as Datastore, Task Queue, and Memcache, are available. To aid in this transition, the App Engine team introduced in Fall 2021 a "wormhole" to the past, allowing apps running on next-generation runtimes to access many of those bundled services. A 2.x app using bundled services required migrating away from those services before their apps could be ported to 3.x, representing a pair of forced migrations back-to-back, potentially challenging ones too. This coupled with the fact that many of these bundled services maturing to become their own standalone Cloud products led the App Engine team to launch the next-generation platform in 2018 without them.įast-forward to today with Python 2 developers eager to upgrade to Python 3. While convenient, users became concerned about the portability of their apps when using proprietary APIs tying them to App Engine and wanted their apps to be more portable. Those services include Datastore, Memcache, and Task Queue. The original App Engine service launched in 2008 and came with a set of legacy APIs (now known as bundled services) to make it convenient for developers to build and deploy applications globally. Survey How will you use this tutorial? Read it through only Read it and complete the exercises How would you rate your experience with Python? Novice Intermediate Proficient How would you rate your experience with using Google Cloud services? Novice Intermediate Proficient
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