Screencasts and Exercises

Posted on Fri 25 October 2019 in TDDA • Tagged with tests, screencast, video, exercises

We've started producing a series of exercises for various aspects of TDDA, available on the blog, with follow-along screencasts.

There will be a series of posts about these, starting on Monday (28th October). There's a YouTube channel as well, if you want to subscribe.

The goal has been for each …

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Installation

Posted on Thu 24 October 2019 in TDDA • Tagged with tdda, python, installation

This post is a standing post that we plan to try to keep up to date, describing options for obtaining the open-source Python TDDA library that we maintain.

Using pip from PyPI

If you don't need source, and have Python installed, the easiest way to get the TDDA library is …

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Rexpy for Generating Regular Expressions: Postcodes

Posted on Wed 20 February 2019 in TDDA • Tagged with regular expressions, rexpy, tdda

Rexpy is a powerful tool we created that generates regular expressions from examples. It's available online at http://rexpy.herokuapp.com and forms part of our open-source TDDA library.

Miró users can use the built-in rex command.

This post illustrates using Rexpy to find regular expressions for UK postcodes.

A …

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Tagging PyTest Tests

Posted on Tue 22 May 2018 in TDDA • Tagged with tests, tagging

A recent post described the new ability to run a subset of ReferenceTest tests from the tdda library by tagging tests or test classes with the @tag decorator. Initially, this ability was only available for unittest-based tests. From version 1.0 of the tdda library, now available, we have …

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Detecting Bad Data and Anomalies with the TDDA Library (Part I)

Posted on Fri 04 May 2018 in TDDA • Tagged with tests, anomaly detection, bad data

The test-driven data analysis library, tdda, has two main kinds of functionality

  • support for testing complex analytical processes with unittest or pytest
  • support for verifying data against constraints, and optionally for discovering such constraints from example data.

Until now, however, the verification process has only reported which constraints failed to …

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