next() - Another round of Python talks
======================================

We are happy to announce the second instance of the PyAmsterdam
meetup. This event will be kindly hosted by Crunchr. This time we want
to make space for 3 talks. And of course as usual, beers and food will
be provided.


Schedule
--------

+-------+-------------------------------------------------------------------------+
| 18:30 | Welcome with drinks and food                                            |
+-------+-------------------------------------------------------------------------+
| 19:00 | First talk: Battle testing your web API using OpenAPI and hypothesis    |
+-------+-------------------------------------------------------------------------+
| 19:30 | Small break                                                             |
+-------+-------------------------------------------------------------------------+
| 19:50 | Second talk: Writing Custom Kubernetes Resource Controllers with Python |
+-------+-------------------------------------------------------------------------+
| 20:30 | Internal implementation of the python dict                              |
+-------+-------------------------------------------------------------------------+
| 20:50 | Networking                                                              |
+-------+-------------------------------------------------------------------------+
| 21:30 | Closing time                                                            |
+-------+-------------------------------------------------------------------------+


Talk1: Battle testing your web API using OpenAPI and hypothesis
---------------------------------------------------------------

by Daniel Bradburn

Daniel is a full-stack developer at crunchr where he is focused on
making the product scalable and robust.


Abstract
~~~~~~~~

Implementing a web API is full of difficulties, it can be frightening
to change the smallest thing, since breaking the contract can have
devastating effects on your consumers. So how can you ensure that you
don't inadvertently introduce errors?

In this talk we will present openapi-conformance, an open source
python library which helps you check that your API implementation does
what it is supposed to. This library is built on top of hypothesis and
openapi-core and brings the power of property based testing to the
world of web API development.

We are starting to use this library at crunchr to help us specify and
test our API, we will share with you some of the insights gained from
this experience.


Talk2: Writing Custom Kubernetes Resource Controllers with Python
-----------------------------------------------------------------

by Jan van der Vegt

Jan is a data scientist that worked at KLM for 3.5 years before
starting Cubonacci, a machine learning life cycle management platform.


Abstract
~~~~~~~~

Kubernetes allows you to orchestrate microservices and batchjobs in a
declerative way. The base Kubernetes resources like Pods, Deployments,
Services and Jobs can get you far but there are benefits to creating
project specific abstractions on top of those. Kubernetes gives you
the option to easily define custom resources that can be managed via
the Kubernetes API.

Of course, what actually needs to happen when you create, patch or
delete these components needs to be coded. Metacontroller is a project
that makes it easy to manage these custom resources via your custom
rolled API. In this talk I will show you what the benefits of custom
resources are, how metacontroller works and how to use a framework
like Flask to implement the business logic for your custom resources.


Talk3: Internal implementation of the python dict
-------------------------------------------------

by Olga Sentemova

Olga is a backend-developer with QA Automation background.


Abstract
~~~~~~~~

The dictionary is probably the most popular data structure in Python.
Lots of iterations of improvements have made it super efficient and
beautiful. Let's see what's under the hood and dive into a world of
open addressing, hash cache and double list keys.


Links
-----