Debugging 'FileNotFoundError: No such file or directory'

When attempting to read a file in Python, you encounter "FileNotFoundError". This error signifies that the script cannot locate the specified file. Your code requests the user to input a filename, "test.rtf", but the error suggests that it cannot be found.

Troubleshooting:

1. Check file path: Ensure that the filename is correct and exists in the expected location. In your case, "test.rtf" should be in the same directory as the Python script.
2. Working directory: The script operates within a specific working directory. Verify that both the Python script and the data file are present in the same directory.
3. Absolute vs. relative paths: If the data file is not in the same directory as the script, specify the entire path to the file (absolute path) or provide a path relative to the working directory.
4. Permission issues: Check if the data file has appropriate read permissions. The script should be able to access the file.
5. Output file vs. input file: Make sure the error is related to the input file (read mode) and not the output file (write mode).