Analyzing your prompt, please hold on...
An error occurred while retrieving the results. Please refresh the page and try again.
If the sheet is empty, then Aspose.Cells for Python via .NET will not print anything when you export worksheet to image. You can change this behavior by using ImageOrPrintOptions.output_blank_page_when_nothing_to_print property. When you will set it true, it will print the blank page.
The following sample code creates the empty workbook which has an empty worksheet and renders the empty worksheet to an image after setting the ImageOrPrintOptions.output_blank_page_when_nothing_to_print property as true. Consequently, it generates the blank page as there is nothing to print which you can see in the image below.

Analyzing your prompt, please hold on...
An error occurred while retrieving the results. Please refresh the page and try again.