Cannot save C:\Users\TR\Desktop\code\Python\Example_1\main.py. Unable to create a backup file (main.py~). The file left unchanged.

I apologize for the inconvenience. There could be a few reasons for this issue. One possibility is that you don't have the necessary permissions to create a backup file in the specified location.

To troubleshoot this issue, you can try the following steps:

1. Check if you have write permissions for the destination folder. Right-click on the folder, go to "Properties," and make sure you have the necessary permissions to create files.
2. Try running your code editor or IDE with administrative privileges. Right-click on the editor or IDE icon and select "Run as administrator."
3. If you're using any antivirus or security software, temporarily disable it and see if you can save the file without any issues. Sometimes, security software can prevent file operations.
4. Ensure that the file you're trying to save is not currently open or being used by another program. Close any other applications that might be accessing the file.

If none of these steps resolve the issue, please provide more details about your development environment, such as the code editor or IDE you're using, the operating system, and any other relevant information.