The issue you’re encountering—where your Python application processes XML files correctly when run standalone but raises an “expecting an int” exception in Visual Studio Code (VS Code)—could stem from several factors. Let’s explore potential causes and solutions:
Environment Differences: • Python Interpreter: Ensure that VS Code is configured to use the same Python interpreter as your standalone environment. Differences in interpreter versions or environments can lead to discrepancies in behavior. • Dependencies: Verify that all necessary libraries and modules are installed and consistent across both environments. Missing or mismatched dependencies can cause unexpected errors.
Exception Handling and Debugging: • Detailed Logging: Enhance your exception handling to log detailed error messages, including stack traces. This can help pinpoint where the “expecting an int” exception originates. • Isolated Testing: Create minimal test cases that replicate the issue. This approach can help isolate the problematic code and determine if the issue is specific to VS Code.
VS Code Configuration: • Extensions: Disable unnecessary extensions that might interfere with your Python environment. Some extensions can cause conflicts or unexpected behavior. • Settings: Review your VS Code settings, especially those related to Python and debugging, to ensure they align with your standalone environment.
XML Parsing Considerations: • Parser Behavior: Different XML parsers may handle data types differently. Ensure that the parser you’re using is consistent across environments and that it correctly interprets the XML data types. • Data Validation: Implement validation checks to ensure that the XML data conforms to expected formats and types before processing.
External Resources: • Similar issues have been discussed in the developer community. For instance, a Stack Overflow thread addresses exceptions encountered when parsing XML using lxml in Python. 
By systematically examining these areas, you can identify and resolve the discrepancies between your standalone script and its execution within VS Code.