作业8

1、通用文件copy工具实现

file_path = input('请输入要复制的文件路径：').strip()
copy_path = input('请输入新文件的路径：').strip()
with open(file_path,mode='rb')as f,open(copy_path,mode='wb') as f1:
    while True:
        line = f.read(1024)
        if len(line) == 0:
            break
        f1.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("b.txt","r+",encoding="utf-8") as f :
    print(f.read())
    f.seek(5,0)
    print(f.tell())
    f.write("bbb")
    print(f.read())
    
with open("b.txt",wr+",encoding="utf-8") as f :
    print(f.read())
    f.seek(5,0)
    print(f.tell())
    f.write("bbb")
    print(f.read())
    
with open("b.txt","a+",encoding="utf-8") as f :
    print(f.read())
    f.seek(5,0)
    print(f.tell())
    f.write("bbb")
    print(f.read())

3.tail -f access.log程序实现