Source code for pyspark.mllib.stat.test

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#    http://www.apache.org/licenses/LICENSE-2.0
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from typing import Generic, Tuple, TypeVar

from pyspark.mllib.common import inherit_doc, JavaModelWrapper


__all__ = ["ChiSqTestResult", "KolmogorovSmirnovTestResult"]

DF = TypeVar("DF", int, float, Tuple[int, ...], Tuple[float, ...])


class TestResult(JavaModelWrapper, Generic[DF]):
    """
    Base class for all test results.
    """

    @property
    def pValue(self) -> float:
        """
        The probability of obtaining a test statistic result at least as
        extreme as the one that was actually observed, assuming that the
        null hypothesis is true.
        """
        return self._java_model.pValue()

    @property
    def degreesOfFreedom(self) -> DF:
        """
        Returns the degree(s) of freedom of the hypothesis test.
        Return type should be Number(e.g. Int, Double) or tuples of Numbers.
        """
        return self._java_model.degreesOfFreedom()

    @property
    def statistic(self) -> float:
        """
        Test statistic.
        """
        return self._java_model.statistic()

    @property
    def nullHypothesis(self) -> str:
        """
        Null hypothesis of the test.
        """
        return self._java_model.nullHypothesis()

    def __str__(self) -> str:
        return self._java_model.toString()


[docs]@inherit_doc class ChiSqTestResult(TestResult[int]): """ Contains test results for the chi-squared hypothesis test. """ @property def method(self) -> str: """ Name of the test method """ return self._java_model.method()
[docs]@inherit_doc class KolmogorovSmirnovTestResult(TestResult[int]): """ Contains test results for the Kolmogorov-Smirnov test. """