difference.py 文件源码

python
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项目:datatest 作者: shawnbrown 项目源码 文件源码
def percent_deviation(self):
        expected = self.expected
        if isinstance(expected, float):
            expected = Decimal.from_float(expected)
        else:
            expected = Decimal(expected if expected else 0)

        deviation = self.deviation
        if isinstance(deviation, float):
            deviation = Decimal.from_float(deviation)
        else:
            deviation = Decimal(deviation if deviation else 0)

        if isnan(expected) or isnan(deviation):
            return Decimal('NaN')
        return deviation / expected if expected else Decimal(0)  # % error calc.
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