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Asked: 2026-05-10T23:51:08+00:00

I need to invoke a VBA macro within an Excel workbook from a python

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I need to invoke a VBA macro within an Excel workbook from a python script. Someone else has provided the Excel workbook with the macro. The macro grabs updated values from an external database, and performs some fairly complex massaging of the data. I need the results from this massaging, and I don’t really want to duplicate this in my Python script, if I can avoid it. So, it would be great if I could just invoke the macro from my script, and grab the massaged results.

Everything I know about COM I learned from ‘Python Programming on Win32’. Good book, but not enough for my task at hand. I searched, but haven’t found any good examples on how to do this. Does anyone have any good examples, or perhaps some skeleton code of how to address/invoke the VBA macro? A general reference (book, web link, etc) on the Excel COM interfaces would also help here. Thanks.

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  1. I am sorry, I dont know python enough. However, the following should help.

    Excel’s Application object has a Run method – which takes the name of the macro alongwith arguments to it.

    Lets assume that the workbook has a macro named test.

      Sub test(ByVal i As Integer) MsgBox 'hello world ' & i End Sub

    You can call this using Application.Run ‘test’, 1234

    This will call the macro and show the messagebox with ‘hello world 1234’.

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