python - 如何删除CSV文件中单行和最后一行的特定数据？

Question

我有一个 CSV 文件，已使用以下代码成功删除了行:

    myfiles = glob.glob('myfile.csv')
    
    for file in myfiles:
        lines = open(file).readlines()
        open(file, 'w').writelines(lines[27:])

现在 CSV 文件中保留的内容如下:

"Football names", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "F10"

"Football weights", "8", "10", "11", "120", "10", "21", "20", "1000", "2000", "3000"

"Copy of Football weights", "8", "10", "11", "120", "10", "21", "20", "1000", "2000", "3000"

我想做的事情:

我一直在尝试使用上面的代码编辑 CSV 文件以完全删除第 6 行，但不知道如何将其添加到上面的代码中，并编辑第 2 行和第 4 行以删除该行的最后 3 个内容(分别为 F8、F9、F10 和 1000、2000、3000)--> 因此 CSV 应如下所示:

"Football names", "F1", "F2", "F3", "F4", "F5", "F6", "F7"

"Football weights", "8", "10", "11", "120", "10", "21", "20"

如果有人能给我一些指示或提示，请先谢谢您。

Answer 1

使用 csv 模块读取并重写回最后 3 列

for file in myfiles:
    rows = []

    with io.open(file,"r",encoding="utf-8") as f:
        reader = csv.reader(f, delimiter=",", quotechar='"')

        for row in reader:
            rows.append(row[:-3])

    with io.open(file,"w",encoding="utf-8") as f:
        writer = csv.writer(f)
        
        for row in rows:
            writer.writerow(row)