类型错误：python 中需要一个浮点数

Question

def calculateProbability(x, mean, stdev):
    exponent = math.exp(-(math.pow(x-mean,2)/(2*math.pow(stdev,2))))
    return (1 / (math.sqrt(2*math.pi) * stdev)) * exponent


exponent = math.exp(-(math.pow(x-mean,2)/(2*math.pow(stdev,2))))

TypeError: a float is required

Answer 1

Make sure the three input parameters x,mean,stdev are integer/float.

It is most likely that one/more of them is not in your case.