文件备份

Posted 2020-12-20 liufengji

```python

file_Name = input("请输入要备份的文件名")
file_1 = open(file_Name,"r")
index = file_Name.rfind(‘.‘)
if index > 0:
    new_name = file_Name[:index]+"备份"+file_Name[index:]
else:
    new_name = file_Name+"备份"


file_2 = open(new_name,"w")
count = file_1.read()
file_2.write(count)

file_1.close()
file_2.close()
```