Testing for models confirming to the scikit-learn api
Project description
ML Testing
The goal of this module is to create a flexible and easy to use module for testing machine learning models, specifically those in scikit-learn.
The tests will be readable enough that anyone can extend them to other frameworks and APIs with the major notions kept the same, but more or less the ideas will be extended, no work will be taken in this library to extend passed the scikit-learn API.
Tests Covered
- Testing Against Metrics
- Classification Tests
- Rule Based Testing:
- precision lower boundary
- recall lower boundary
- f1 score lower boundary
- Decision Based Testing:
- precision fold below average
- recall fold below average
- f1 fold below average
- Rule Based Testing:
- Regression Tests
- Rule Based Testing:
- Mean Squared Error upper boundary
- Median Absolute Error upper boundary
- Decision Based Testing:
- Mean Squared Error fold above average
- Median Absolute Error fold above average
- Rule Based Testing:
- Classification Tests
- Testing Against Run Time Performance
- prediction run time for simulated samples of size X
- Testing Against Input Data
- percentage of correct imputes for any columns requiring imputation
- dataset testing - http://www.vldb.org/pvldb/vol11/p1781-schelter.pdf
- Memoryful Tests
- cluster testing - this is about the overall structure of the data If the number of clusters increases or decreases substantially that should be an indicator that the data has changed enough that things should possibly be rerun
- correlation testing - this is about ensuring that the correlation for a given column with previous data collected in the past does not change very much. If the data does change then the model should possibly be rerun.
- shape testing - this is about ensuring the general shape of for the given column does not change much over time. The idea here is the same as the correlation tests.
Possible Issues
Some known issues with this, any machine learning tests are going to require human interaction because of type 1 and type 2 error for statistical tests. Additionally, one simply needs to interrogate models from a lot of angles. It can't be from just one angle. So I'm not even sure if the overall notion of adding ML testing into a CI pipeline is really feasible.
Future Features
- cross validation score testing
- add custom loss function
- add custom accuracy function
- add these tests: https://www.datasciencecentral.com/profiles/blogs/a-plethora-of-original-underused-statistical-tests
- clustering for classification
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