将下表数据写入一个文件，然后读取该文件数据，并输出到屏幕，且求取平均值，将每条平均值信息输出到average.txt中。 姓名，数学，语文，英语 张三,78,86,89 曾平,82,98,75 李梅,88,98,82

写入数据到文件：

data = "姓名,数学,语文,英语\n张三,78,86,89\n曾平,82,98,75\n李梅,88,98,82"

with open("scores.txt", "w") as f:
    f.write(data)

读取文件数据并输出到屏幕：

with open("scores.txt", "r") as f:
    lines = f.readlines()
    for line in lines:
        print(line.strip())

求取平均值并将每条平均值信息输出到average.txt中：

with open("scores.txt", "r") as f:
    lines = f.readlines()
    with open("average.txt", "w") as f2:
        f2.write("姓名,平均值\n")
        for line in lines[1:]:
            name, math, chinese, english = line.strip().split(",")
            average = (int(math) + int(chinese) + int(english)) / 3
            f2.write(f"{name},{average:.2f}\n")
            print(f"{name}的平均值为：{average:.2f}")

完整代码：

data = "姓名,数学,语文,英语\n张三,78,86,89\n曾平,82,98,75\n李梅,88,98,82"

with open("scores.txt", "w") as f:
    f.write(data)

with open("scores.txt", "r") as f:
    lines = f.readlines()
    with open("average.txt", "w") as f2:
        f2.write("姓名,平均值\n")
        for line in lines[1:]:
            name, math, chinese, english = line.strip().split(",")
            average = (int(math) + int(chinese) + int(english)) / 3
            f2.write(f"{name},{average:.2f}\n")
            print(f"{name}的平均值为：{average:.2f}")

with open("scores.txt", "r") as f:
    lines = f.readlines()
    for line in lines:
        print(line.strip())