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Improve Consistency of Transform Primitives #236

merged 3 commits into from Aug 29, 2018


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Due to the use of a frozenset which is an unordered Python object, the order of commutative transform primitives that used multiple columns, such as AND, could change when running Deep Feature Synthesis in different Python sessions. This behavior did not affect the feature values because the primitives are commutative. It did change the feature definitions which made comparing different sets of feature definitions a challenge.

The behavior is addressed by sorting the features used in commutative transform primitives alphabetically by name. For example, if the transform primitive AND is used with the features (columns) FLAG_A and FLAG_B the resulting feature will be AND(FLAG_A, FLAG_B).

@WillKoehrsen WillKoehrsen changed the title Consistency of Transform Primitives Improve Consistency of Transform Primitives Aug 29, 2018
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codecov-io commented Aug 29, 2018

Codecov Report

Merging #236 into master will increase coverage by 0.01%.
The diff coverage is 100%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master     #236      +/-   ##
+ Coverage   93.63%   93.65%   +0.01%     
  Files          71       71              
  Lines        7671     7690      +19     
+ Hits         7183     7202      +19     
  Misses        488      488
Impacted Files Coverage Δ
featuretools/synthesis/ 93.22% <100%> (+0.03%) ⬆️
...ols/tests/dfs_tests/ 98.45% <100%> (+0.08%) ⬆️

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kmax12 commented Aug 29, 2018

Looks good. Merging

@kmax12 kmax12 merged commit 78a5e7c into master Aug 29, 2018
@kmax12 kmax12 mentioned this pull request Sep 28, 2018
@WillKoehrsen WillKoehrsen deleted the transform-stability branch October 2, 2018 18:11
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3 participants