Excel Manipulation using Python

[Krishna]

I was trying to delete rows in an existing .xls file using python. How
do I do that? I was using the following code, it seem to work if I
type in python window, but if I save it in text editor and drage and
drop the .py file, it doesnt work. What am I doing wrong here?  Thanks
for your help!

import win32com.client
from time import sleep
excel = win32com.client.Dispatch("Excel.Application")

def Extract():
        excel.Visible = 0
        workbook=excel.Workbooks.Open('C:\Trial.xls')

        i=1
        for n in range(1,10):
                excel.Rows(i).Select
                excel.Selection.Delete
                excel.Selection.Delete
                i=i+2
                workbook.Save()
                print "saved"

        excel.Quit()
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