Running an Excel macro via Python?

Solution 1:

I would expect the error is to do with the macro you're calling, try the following bit of code:

Code

import os, os.path
import win32com.client

if os.path.exists("excelsheet.xlsm"):
    xl=win32com.client.Dispatch("Excel.Application")
    xl.Workbooks.Open(os.path.abspath("excelsheet.xlsm"), ReadOnly=1)
    xl.Application.Run("excelsheet.xlsm!modulename.macroname")
##    xl.Application.Save() # if you want to save then uncomment this line and change delete the ", ReadOnly=1" part from the open function.
    xl.Application.Quit() # Comment this out if your excel script closes
    del xl

Solution 2:

I did some modification to the SMNALLY's code so it can run in Python 3.5.2. This is my result:

    #Import the following library to make use of the DispatchEx to run the macro
    import win32com.client as wincl

    def runMacro():

        if os.path.exists("C:\\Users\\Dev\\Desktop\\Development\\completed_apps\\My_Macr_Generates_Data.xlsm"):

        # DispatchEx is required in the newest versions of Python.
        excel_macro = wincl.DispatchEx("Excel.application")
        excel_path = os.path.expanduser("C:\\Users\\Dev\\Desktop\\Development\\completed_apps\\My_Macr_Generates_Data.xlsm")
        workbook = excel_macro.Workbooks.Open(Filename = excel_path, ReadOnly =1)
        excel_macro.Application.Run\
            ("ThisWorkbook.Template2G")
        #Save the results in case you have generated data
        workbook.Save()
        excel_macro.Application.Quit()  
        del excel_macro

Solution 3:

Just a quick note with a xlsm with spaces.

file = 'file with spaces.xlsm'
excel_macro.Application.Run('\'' + file + '\'' + "!Module1.Macro1")

Solution 4:

I suspect you haven't authorize your Excel installation to run macro from an automated Excel. It is a security protection by default at installation. To change this:

1. File > Options > Trust Center
2. Click on Trust Center Settings... button
3. Macro Settings > Check Enable all macros