Teacher’s code:

try:

    import os

    os.chdir(r'D:\\y')

    list1 = list(open('score_1 .txt'))

    file1 = open('score_2.txt','w')

    del(list1[0]) #删除的是list1的第一行，原本的score_1.txt没有变化

    file1.write("number\\tEnglish score\\n")

    for s in list1:

        x = s.split()    #按照空格来切片分组

        x[1] = int(x[1]) + 20

        file1.write(f'{x[0]}\\t{x[1]}\\n')

#[Errno 2] No such file or directory: 'score_1 .txt'
except IOError as e:

    print(e)

#[WinError 2] 系统找不到指定的文件。: 'D:\\\\y'
except OSError as ee:

    print(ee)

#No module named 'os' -- 一般很少使用
except ImportError as eee:

    print(eee)

except BaseException as eeee:

    print(eeee)

else:

    file1.close()

    os.system('notepad score_2.txt')

(But I have a macOS so it wouldn’t run)