Python学习————作业

1、通用文件copy工具实现

src_file = input("输入文件路径:").strip()
new_file = input("输入新文件路径:").strip()
with open(f'{src_file}', mode="rb") as f1, 
        open(f'{new_file}', mode="wb") as f2:
    for line in f1:
        f2.write(line)

2、基于seek控制指针移动，测试r+、w+、a+模式下的读写内容

with open("a.txt", "r+", encoding="utf-8") as f:
    print(f.read())
    f.seek(6, 0)
    print(f.tell())
    f.write('1111
222
3333
')
    print(f.read())
with open("a.txt", "w+", encoding="utf-8") as f:
    print(f.read())
    f.seek(6, 0)
    print(f.tell())
    f.write('1111
222
3333
')
    print(f.read())

with open("a.txt", "a+", encoding="utf-8") as f:
    print(f.read())
    f.seek(6, 0)
    print(f.tell())
    f.write('1111
222
3333
')
    print(f.read())

3、tail -f access.log程序实现

cmd = input("请输入b文件追加的信息：").strip()
with open("b.txt", "a+t", encoding="utf-8") as f:
    f.write(cmd)
with open("b.txt", "r", encoding="utf-8") as f:
    print(f.read())