python - 使用特定公式进行加权平均

infileName="grades.txt"
infile=open(infileName,"r")
outfileName="weightedavg.txt"
outfile=open(outfileName,"w")
for line in infile:
    test=line.strip()
    test=line.split()
    fname=test[0]
    lname=test[1]
    grades=test[3::2]
    weights=test[2::2]
   grades=[int(i) for i in grades]
   weights=[int(i) for i in grades]
   weightedavg=????

  加权平均值的公式是（weight1 * grade1）+（weight2 * grade2）... +（weightn + graden）

最佳答案

生成器表达式（您可以将其视为隐式列表理解）可能是最“ Pythonic”的解决方案：

grades = [83, 92, 96]
weights = [0.4, 0.4, 0.2]
weighted_avg = sum(x * y for x,y in zip(grades, weights))

最后，weighted_avg == 89.2

关于python - 使用特定公式进行加权平均，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/29401604/