encoder.py 文件源码

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(rounded)