unsupported operand type(s) for *: 'float' and 'decimal.Decimal'

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unsupported operand type(s) for *: 'float' and 'decimal.Decimal'

co=round(co/2,3) 

co_aqi=AqiCommon.getIAQI(co,'co_hour')报错

co_aqi=AqiCommon.getIAQI(0.3,'co_hour')可计算出IAQI值为3

float(round(co/2,2))