add sheet to existing workbook openpyxl

from openpyxl import load_workbook
wb2 = load_workbook('template.xlsx')
wb2.create_sheet('sid1')
wb2.save('template.xlsx')

 1from openpyxl.workbook import Workbook
 2
 3wb = Workbook()
 4
 5ws1 = wb.create_sheet("Sheet_A")
 6ws1.title = "Title_A"
 7
 8ws2 = wb.create_sheet("Sheet_B", 0)
 9ws2.title = "Title_B"
10
11wb.save(filename = 'sample_book.xlsx')