datatest 0.9.0

Test driven data-wrangling and analysis for pytest and unittest.

Datatest provides tools for test driven data-wrangling and analysis. It supports both pytest and unittest style testing.

You can use datatest to automate checklists, log discrepancies, and measure progress. It encourages a structured approach for preparing messy data that needs to be cleaned, integrated, formatted, and verified.

• Documentation:

  • https://datatest.readthedocs.io/ (stable)

  • https://datatest.readthedocs.io/en/latest/ (latest)

• Official Releases:

  • https://pypi.org/project/datatest/

• Development:

  • https://github.com/shawnbrown/datatest

Installation

The easiest way to install datatest is to use pip:

pip install datatest

To upgrade an existing installation, use the “--upgrade” option:

pip install --upgrade datatest

Stuntman Mike

If you need bug-fixes or features that are not available in the current stable release, you can “pip install” the development version directly from GitHub:

pip install --upgrade https://github.com/shawnbrown/datatest/archive/master.zip

All of the usual caveats for a development install should apply—only use this version if you can risk some instability or if you know exactly what you’re doing. While care is taken to never break the build, it can happen.

Safety-first Clyde

If you need to review and test packages before installing, you can install datatest manually.

Download the latest source distribution from the Python Package Index (PyPI):

https://pypi.org/project/datatest/ (navigate to “Download files”)

Unpack the file (replacing X.Y.Z with the appropriate version number) and review the source code:

tar xvfz datatest-X.Y.Z.tar.gz

Change to the unpacked directory and run the tests:

cd datatest-X.Y.Z
python setup.py test

Don’t worry if some of the tests are skipped. Tests for optional data sources (like pandas DataFrames or MS Excel files) are skipped when the related third-party packages are not installed.

If the source code and test results are satisfactory, install the package:

python setup.py install

Supported Versions

Tested on Python 2.6, 2.7, and 3.1 through 3.6; PyPy and PyPy3. Datatest is pure Python and may also run on other implementations as well (check using “setup.py test” before installing).

Backward Compatibility

If you have existing tests that use API features which have changed since 0.8.0, you can still run your old code by adding the following import to the beginning of each file:

from datatest.__past__ import api08

To maintain existing test code, this project makes a best-effort attempt to provide backward compatibility support for older features. The API will be improved in the future but only in measured and sustainable ways.

All of the data used at the National Committee for an Effective Congress has been checked with datatest for several years so there is, already, a large and growing codebase that relies on current features and must be maintained into the future.

Dependencies

There are no hard, third-party dependencies. But if you want to interface with pandas DataFrames, MS Excel workbooks, or other optional data sources, you will need to install the relevant packages (pandas, xlrd, etc.).

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Freely licensed under the Apache License, Version 2.0

Copyright 2014 - 2018 NCEC Services, LLC and contributing authors