Python和Excel：尽管有XlSaveConflictResolution值，但覆盖现有文件总是会提示

I'm using the Excel.Application COM object from a Python program to open a CSV file and save it as an Excel workbook. If the target file already exists, then I am prompted with this message: "A file named '...' already exists in this location. Do you want to replace it?" That message comes up despite the fact that I have set the I'm using the Excel.Application COM object from