Python 模擬cp操作

1.創建~/bin/cp.py

2.將/bin/ls "拷貝"到/root/目錄xia

3.要求讀取/bin/ls后,每次讀取4096字節,一次寫入到新文件

4.不要修改原始文件

 

#/usr/bin/env python

sfname = open('/bin/ls')
dfname = open('/tmp/ls','w')

while True:
    data = sfname.read(4069)
    if not data:
        break
    dfname.write(data)

sfname.close()
dfname.close()

[root@localhost ~]# md5sum  /tmp/ls
062551aec6c44f228777fde0ea992a65  /tmp/ls
[root@localhost ~]# md5sum  /bin/ls
062551aec6c44f228777fde0ea992a65  /bin/ls