Folks,
There is an excel document that needs weekly updating… Just a few cells that need to be updated, which is totally doable via: http://www.python-excel.org/
After these cells are updated, a graph is generated inside excel. Is it possible to export this graph into a .png via python (ie, copy cells A3-B7 and export into an image)?
Thoughts, ideas?
Thanks!
You could export an existing chart to PNG using COM extensions. You will have to make sure the chart has been already updated with the new data before exporting.
I found this discussion of the Charts object helpful:
http://msdn.microsoft.com/en-us/library/aa213725(v=office.11).aspx
You would up with something like this (untested code):
from win32com.client import Dispatch
xlsApp = Dispatch("Excel.Application")
xlsWB = xlsApp.Workbooks.Open(r'C:\TEST\WorkbookWithAChart.xlsx')
xlsSheet = xlsWB.Sheets("Sheet 1")
mychart = XlsSheet.Charts(1) #'1' is the index of the chart object in the wb
mychart.Export(Filename=r'C:\TEST\MyExportedChart.png')
Helpful references:
Answer：
This is going to be impossible without actually using Excel. You need Excel to draw the graph with the updated information.
If you can use Excel, you can write a macro which exports the chart to a PDF file. Something like this:
Sheets("Sheet1").ChartObjects("Chart Name").Chart.ExportAsFixedFormat _
Type:=xlTypePDF, _
Filename:="C:\folder\filename.pdf", _
Quality:=xlQualityStandard, _
OpenAfterPublish:=False
Tags: excel, pythonpython
