How can I effectively troubleshoot and fix an 'unexpected indent' error in my Python code?

To fix this error, first pinpoint the line number indicated in the error message. Then: 1. **Visually Inspect:** Look closely at the indicated line and the lines immediately preceding it for extra spaces or tabs. 2. **Show Whitespace Characters:** Most text editors and IDEs have a feature to display whitespace characters (e.g., 'Show Invisibles' or 'Show Whitespace'). This will make tabs and spaces visible, helping you identify mixed indentation or rogue characters. 3. **Consistent Indentation:** Ensure you are using either all spaces or all tabs (preferably 4 spaces per indent, which is the PEP 8 standard). 4. **Re-indent:** Select the affected code block and use your editor's re-indent function or manually delete and re-add the indentation. 5. **Linter Tools:** Use linters like Pylint or Flake8, which can often highlight such issues before execution.