Python Decimal 模块中的 ROUND_HALF_EVEN 和 ROUND_HALF_DOWN 在Python 中,Decimal 模块提供了高精度的十进制浮点数运算,可以避免浮点数计算时出现的精度丢失问题。Decimal 模块中有两种常用的舍入模式:ROUND_HALF_EVEN 和 ROUND_HALF_DOWN。这两种舍入模式对于处理浮点数的舍入操作非常有用。 Decimal 模块 Decimal...
def _round_quantize(self, val): # round() has different behavior in python 2/3 # For consistency between 2 and 3 we use quantize, however # it is slower than the built in round function. d = decimal.Decimal(val) rounded = d.quantize(1, rounding=decimal.ROUND_HALF_EVEN) return float...