mldissect

mldissect is model agnostic predictions explainer, library can show contribution of each feature of your prediction value.

Features

• Supports predictions explanations for classification and regression
• Easy to use API.
• Works with pandas and numpy

Installation

Installation process is simple, just:

$ pip install mldissect

Basic Usage

# lets train a model
boston = load_boston()
columns = list(boston.feature_names)
X, y = boston['data'], boston['target']
X_train, X_test, y_train, y_test = train_test_split(
    X, y, test_size=.2, random_state=seed
)

clf = LassoCV()
clf.fit(X_train, y_train)

# select first observation in test split
observation = X_test[0]
# RegressionExplainer uses training data or sample of training data
# for large dataset to figure out contributions of each feature
explainer = RegressionExplainer(clf, X_train, columns)
result = explainer.explain(observation)
# print/visualize explanation
explanation = Explanation(result)
explanation.print()

result:

+----------+---------+--------------------+
| Feature  | Value   | Contribution       |
+----------+---------+--------------------+
| baseline | -       | 22.611881188118804 |
| LSTAT    | 7.34    | 3.6872             |
| PTRATIO  | 16.9    | 1.3652             |
| CRIM     | 0.06724 | 0.2323             |
| B        | 375.21  | 0.1195             |
| RM       | 6.333   | 0.0411             |
| INDUS    | 3.24    | 0.0312             |
| CHAS     | 0.0     | 0.0                |
| NOX      | 0.46    | 0.0                |
| TAX      | 430.0   | -0.3794            |
| AGE      | 17.2    | -0.5127            |
| ZN       | 0.0     | -0.6143            |
| DIS      | 5.2146  | -1.0792            |
| RAD      | 4.0     | -1.0993            |
+----------+---------+--------------------+

Algorithm

Algorithm is based on ideas describe in paper "Explanations of model predictions with live and breakDown packages" https://arxiv.org/abs/1804.01955

Difference with pyBreakDown

pyBreakDown is similar project, but there is key differences:

• mldissect is maintained
• Has tests and good code coverage.
• Classification is working properly.
• Multi class support.
• Top down approach is not implemented.
• Friendly license.

Requirements

• Python 3.6+
• numpy