python openpyxl writing data

[Bikram]

Sorry !!
I solved this problem.
I have anew problem. I ma not able to delete a Bar Chart which i have created using OPENPYXL in PYTHON.
Here is the code:

chart=BarChart() 
data=Reference(sheet2,min_row=2, max_row=sheet2.max_row, min_col=3)
category=Reference(sheet2,min_col=2, min_row=2, max_row=sheet2.max_row)
chart.add_data(data, titles_from_data=False)
chart.set_categories(category)
sheet2.add_chart(chart,"M3")
chart.title="Count"
chart.x_axis.title= "Time"
chart.y_axis.title="Reason"