python 问题 如何用python 求n个数的平均值 然后保留小数

print("这个数组平均数为",sum/b)或 import sys sum = 0 cnt = 0 f = open('1.txt', 'r')files = f.readline()while (files ):sum = sum + float(files .split(",")[0])cnt = cnt + 1 files = f.readline()print(sum / cnt)f.close()或者。!/usr/bin/env pythonimport...