小编Ros*_* .j的帖子

from random import uniform

def e(x):
    n=len(x)
    return(sum(x)/n)

    def dmean(e,x,new):
    n=len(x)
    return((e*n+new)/(n+1))

    l=[1,2,3,4,5,6,78]
    e(l)

    for i in range(0,5):
    l.append(uniform(0,10))
    e=e(l)
    d=dmean(e,l,uniform(0,10))