Sebastian Rittau

Category: Python

  • python-dectest — Improved unittest.TestCase

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    I have released the first version of dectest for Python (Github), an improved version of unittest.TestCase. It is a drop-in replacement with two improvements: decorators for tests, setup, and teardown methods. This is not only more explicit than the “magic” names of unittest, it also allows multiple setup and teardown methods per class. A patch() helper method that calls unittest.mock.patch(),…

  • Python asserts and json-get with type hints

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    I released new versions of python-asserts  (0.8.2) and python-json-get (1.1.0) that include type hints, so that typecheckers like mypy will now be able to type check calls to those libraries. json-get uses asserts for its tests and it’s now possible to type check it without –ignore-missing-imports. In addition, json-get now has a json_get_default() function that returns a default…

  • dbupgrade – A Database Migration Tool – published

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    Yesterday I published dbupgrade, a simple database migration tool, written in Python. It allows you to put database migration files (simple SQL files with a special header) into a directory and upgrade your database schema. While this is a new project, it was extracted from an internal library I’ve been using for years and should…

  • setuptools breaks PYTHONPATH

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    setuptools and egg files are a great way to distribute Python packages and programs. But today I stumbled over a really braindead design decision: setuptools overrides Python’s standard module search path algorithm in a very inconvenient way. Normally, when Python looks for a module or package, it first looks in the current directory, then in any…

  • gnome-keyring with Python

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    The documentation on gnome-keyring I discovered helped me to access it successfully with Python. I’ve written a small module that fetches and stores a username and a password for some server. Some notes: The attributes are freeform, but there a some common attributes for network hosts. These are: “user”, “domain”, “server”, “object”, “protocol”, “authtype”, and “port”. Actually there is…

  • New Python unittest module?

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    Collin Winter blogs about an updated unittest module he wrote. His update fixes the internal structure, and therefore the expandability, of the module, but also cleans up the external API. There are still a few minor improvements I would like to see, but nevertheless I hope that his updated version will be included in Python’s standard library eventually.

  • PyUnit and Decorators

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    One of the shortcomings of the Python standard library is in my opinion that PyUnit doesn’t use decorators (as later versions of JUnit and NUnit do). Therefore I have written a sample implementation that adds decorator support. (unittest.py; diff to Python 2.5’s unittest.py) To do: Warn when old-style and new-style tests are mixed. Throw an exception when multiple setup or teardown methods exist. Ability…

  • XML Test Runner for PyUnit

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    JUnit features an XML Test Runner. This means that the result of a test run is not written to stdout, but instead written into an XML file. This XML file can then be automatically processed. This is for example useful for fully automated builds using software like CruiseControl. The XML output is easily converted into an XHTML…

  • Python Warts

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    I started my own page of Python warts, similar to A. M. Kuchling’s popular page. At the moment it just features one wart (the len() function vs. a length property on container classes). But I plan to add more warts in the future. I will probably concentrate on warts in the standard library. (And there are tons of them.) Two…

  • Python Bindings for librsvg

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    Background: I started to re-write the old GNOME Chess application in Python. GNOME Chess is still a Gtk+ 1.2 application and as its Debian maintainer I want a modern version in Debian. Of course the chess board should be drawn with Cairo and the chess pieces were supposed to be SVG graphics. After a little research I…