Hi Sivaji,
You can supply the workbook ID instead of the workbook name in the spy.push() command. The pushed items will be scoped to the supplied workbook ID and no new workbook will be created. For example:
spy.push(data,metadata,workbook='workbook ID of Test_Workbook', worksheet='test')
I have also replied to your SUP ticket about this same question.
Regards,
Kin How