#需要求加权平均值的数据列表
elements = []
#对应的权值列表
weights = []
使用numpy直接求：i

mport numpy as np
 
np.average(elements, weights=weights)

# 不使用numpy写法1
round(sum([elements[i]*weights[i] for i in range(n)])/sum(weights), 1)
 
# 不使用numpy写法2
round(sum([j[0]*j[1] for j in zip(elements, weights)])/sum(weights), 1)