It’s maintenance day in my little Python world. I just released new versions of two small but apparently quite popular packages: eve-swagger, the OpenAPI/Swager extensions for Eve-powered APIs, hits v0.1.4. It’s just a single fix for API breakage introduced with the previous release; details available here. Thanks to Asger Gitz-Johansen for the help with this release. Flask-Sentinel, an Oauth2 Provider for Flask, hits v0.0.8. This also is a small release that fixes 500 errors if you were using unpinned versions of redis. »
Pattern Matching is coming to Python, and I am not sure I like it. Don’t get me wrong, I love pattern matching. I use it all the time in F#. I am sure that once it lands in the language, it will be wildly adopted. So what’s the problem with Python’s pattern matching? The community, some core developers included, has expressed several concerns. The Python Steering Council has acknowledged them and is willing to look into improvements should they be proposed. »
Ever had your old, trusty Python virtual environment fail on you? I sure did. Sometimes, when I activate or switch between virtual environments, I get the following error: $ workon eve dyld: Library not loaded: @executable_path/../.Python I never really took the time to look into it. When this happens, because I am in a rush (and because I am a lazy old fart), I shrug it off, recreate the virtual environment on the spot, and get back to work. »
Visual Studio 2017 just received an update (version 15.2). Among other nice things, this update brings full support for Python back into the official release of VS2017. As you might recall (see my old whiny post), previously Python was only available with Visual Studio 2017 Preview (a separate install). I just upgraded my copy of Visual Studio, added the Python Development Workload to it via the VS Installer, and finally (and very happily) uninstalled the whole Visual Studio Preview thingie. »
Last February I published The State of Eve REST Framework. Among other things in that post, I mentioned that I was looking for ways that would allow me to allocate more time to the project (and its satellites). I really feel like I should put more effort into Eve, Cerberus and satellite projects Eve-Swagger, Flask-Sentinel, Eve.NET, etc. I love working on these projects and I know a lot of people rely on them. »
So yesterday Visual Studio 2017 was released. Big news. Lots of cool stuff. As I write this I am watching the live stream of the 2 days-long launch event. If you want to learn about Python support in VS2017 though, you have to dig deeper and head over to the Python Engineering blog at Microsoft. As expected, the official release is actually coming out with no support for Python. It will come in a few months. »
So how do you install the awesome Python Development Tools on the latest Visual Studio 2017 RC? That might seem a stupid question considering that the Data Science and Python Development workload has been available with every Release Candidate so far. You simply select the workload during the installation and you’re done, right? Not quite. I found out the hard way this morning as I wanted to install VS 2017 RC3 on my development machine and, to my surprise, I could not find Python Development anywhere on the workloads window (which itself is a huge improvement over the VS 2015 install experience, by the way). »
A new major release of the Eve REST API Framework is finally out with a number of cool new features (MongoDB Aggregations!), few fixes, and a couple of minor breaking changes. On the Eve blog you can find a detailed article about this important release. I am glad to report that the Eve-SQLAlchemy community extension, which allows SQL databases to serve as Eve backends, has seen a surge of activity around it. »
After a one year long development cycle I am proud to announce that version 1.0 of Cerberus, the data validation and transformation tool for Python, is finally out. A while ago I wrote an article on the new features and breaking changes that come with it, so please check it out carefully along with the changelog. I just wish to reiterate my gratitude towards all the contributors to the project. The ones who specifically worked on this awesome release, those who made it all possible, are: Matthew Ellison, Dominik Kellner, David Kirkendall, Damián Nohales, calve, Jonathan Huot, Roman Redkovich and of course the one and the only Frank Sachsenheim, whose role was pivotal to this release. »
Released by the nice folks at Drud, EveGenie is a tool for making Eve schema generation easier. Eve’s schema definitions are full of features, but can take a good amount of time to create when dealing with lots of complex resources. From our experience, it’s often helpful to describe an endpoint in JSON before creating it as an Eve schema. This allows you to make quick decisions about the structure of your entities without spending time moving schema code around. »
Quick note to let you all know that Eve v0.6.4 is out with a few significant updates. Thanks to James Stewart for contributing to this release. Work on v0.7, which will include MongoDB Aggregation Framework support (docs) and many other new features, continues steadily. »
Eve-Swagger is a swagger.io extension for Eve powered RESTful APIs. It has been around for a while on GitHub but I never managed to officially release it. So rejoice! it is now available on PyPI. But what is Swagger, and why is it useful to your RESTful API? With a Swagger-enabled API you can get interactive documentation, client SDK generation and discoverability, all for free. From Swagger website: Swagger is a simple yet powerful representation of your RESTful API. »
Cerberus is a lightweight and extensible data validation library for Python. Beta has been around since 2012. During this time Cerberus has been serving as the validation system for Eve core. It has been also adopted by a quite a lot open source projects, averaging around 18K downloads per month on PyPI and collecting some remarkable endorsements.
All things considered, I would dare to claim that Cerberus is battle tested to death. This is, in fact, one reason why I believe that the time for a canonical and stable release has come. Another reason is that next release is a major one. It brings a ton of important new features along with very significant code refactoring and a redesigned, powerful API. Third, next release breaks backward compatibility, and we want to signal that in the version number.
So next Cerberus release will be 1.0. If you have been following the development this will come as no surprise, as a Release Candidate has been out for a while. As a Cerberus user you will want to take the plunge and upgrade to 1.0 because well, it is just too cool to be true. If new to Cerberus you will also want to adopt 1.0 right away, for the same reason. If you are new however, make sure you get the basics covered before reading further. By the way, at latest PyCon Italy I gave a talk on Cerberus which also included a preview of several 1.0 features. You can check the slides to get a general idea of the tool, its usage, and upcoming features.
Let’s now look at some of the relevant features and changes introduced with Cerberus 1.0. For a (mostly) accurate list of changes and new features, have a look at the changelog.»
April was definitely my crazy Speaking Month. After an almost one year long self-imposed conference hiatus, I was challenged to deliver four different talks, attend two discussion panels, give one live demo and release one interview. All in a three weeks period span. First I went to PyCon Sette in Florence. A few days later a plane took me to St. Petersburg, Russia, for PiterPy. Finally, the next weekend I was in Rome for the Western Europe Microsoft MVP Community Day. »
Today I released Eve 0.6.2. It includes many fixes and improvements over the previous releases. Areas addressed are CORS management, soft deletes, token authentication, oplog, data validation, and others. Please see the changelog for details. Work on v0.7 is also ongoing. It will include new features such as support for the MongoDB Aggregation Framework (docs) and a few breaking changes, so you might want to check it out in advance. »
A new version of Eve, the REST API framework for Humans, has been released today. Following the 0.6 milestone released one month ago, v0.6.1 introduces some fixes and few new important features. Upgrade is strongly encouraged. As always, a changelog with full list of updates is available. »
The slides of my talk at Percona Live 2015 (Amsterdam) are online. It was titled “MongoDB and REST APIs a Match Made in Heaven” and it was meant as an introduction to Mongo, REST principles and the Eve python framework. Overall it has been a pleasant experience, although I found that splitting 300 attendees through seven concurrent tracks ultimately led to too much fragmentation. People often found themselves with 2-3 interesting talks all happening simultaneously, and just had to pick one. »
On Stack Overflow and the Eve mailing list, but also in my mailbox and even on Twitter, I get a lot of enquiries on how to build custom endpoints within a Eve-powered RESTful application. Now, since within Eve all endpoints are fully customizable, what they really mean is: How do I setup endpoints without any binding to a data entity, just connected to a custom method? They would like to call something like /mycustomendpoint and get the response from a method they have defined somewhere in the Python sources. »
A few days ago Cerberus 0.9 was released. It includes a bunch of new cool features, let’s browse through some of them. Collection rules First up is the new set of anyof, allof, noneof and oneof validation rules. anyof allows you to list multiple sets of rules to validate against. The field will be considered valid if it validates against one set in the list. For example, to verify that a property is a number between 0 and 10 or 100 and 110, you could do the following: »
I was lucky enough be the first guest for the shiny new Talk Python To Me Podcast hosted by Michael Kennedy. In this episode we talk about Eve an my other open source releases, which gives us an excuse to touch on a variety of topics such as Polyglot Programming, New Microsoft and the .NET evolution, MongoDB and the Open Source eco-system as seen from the point of view of an old fart who has been spending most of his career in closed systems. »