编写程序:将当前文件夹下的oldfile.txt文件内容copy到当前文件夹下新建的newfile.txt中,并将newfile.txt的内容输出,另:保留换行符,且文本内容不得更改。
时间: 2023-06-15 17:08:26 浏览: 115
以下是Python代码实现:
```python
with open('oldfile.txt', 'r') as old_file:
with open('newfile.txt', 'w') as new_file:
for line in old_file:
new_file.write(line)
with open('newfile.txt', 'r') as new_file:
print(new_file.read())
```
首先,我们使用`with open()`语句打开`oldfile.txt`文件,并以只读模式(`'r'`)读取其中的内容。然后,我们使用`with open()`语句新建一个`newfile.txt`文件,并以写入模式(`'w'`)将从`oldfile.txt`中读取的内容写入到新建的文件中。
接着,我们再次使用`with open()`语句打开`newfile.txt`文件,并以只读模式(`'r'`)读取其中的内容。最后,我们使用`print()`函数将读取的内容输出到控制台上。注意,在读取文件内容时,我们要使用`read()`函数将整个文件的内容读取出来。
相关问题
用python语言1、编写程序:将当前文件夹下的oldfile.txt文件内容copy到当前文件夹下新建的newfile.txt中,并将newfile.txt的内容输出,另:保留换行符,且文本内容不得更改。指明其知识点
这道题主要涉及文件读写操作,需要使用Python内置的open()函数打开文件,并使用read()函数读取文件内容,再使用write()函数将内容写入新文件中,最后使用close()函数关闭文件。代码如下:
```python
with open('oldfile.txt', 'r') as f:
content = f.read()
with open('newfile.txt', 'w') as f:
f.write(content)
with open('newfile.txt', 'r') as f:
print(f.read())
```
其中,第一个with语句用于打开旧文件,将其内容读取到变量content中;第二个with语句用于创建新文件并将content写入其中;第三个with语句用于打开新文件并输出其内容。
知识点:文件读写操作。
Usage: cp oldfile newfile
`cp` is a command-line utility used to copy files or directories. The `oldfile` represents the file or directory you want to copy, and `newfile` is the destination where you want to create a copy of the original file.
For example, if you have a file named "example.txt" in the current directory and you want to make a copy of it named "example_copy.txt", you would run the following command:
```
cp example.txt example_copy.txt
```
This will create a new file named "example_copy.txt" with the same content as the original "example.txt" file.
If you want to copy a directory and its contents, you can use the `-r` or `--recursive` option:
```
cp -r sourcedir destdir
```
Replace `sourcedir` with the name of the source directory and `destdir` with the destination directory where you want to create a copy.
Please note that if the destination file or directory already exists, the `cp` command will overwrite it unless you use specific options to prevent it.