book_append_sheet

As an AI language model, I am unable to perform actions like appending sheets to a book. However, the following Python code can be used to append a sheet to an existing workbook using the openpyxl library:

from openpyxl import load_workbook
from openpyxl.utils import get_column_letter

# Load the workbook
wb = load_workbook('example.xlsx')

# Create a new sheet
new_sheet = wb.create_sheet('New Sheet')

# Add data to the sheet
for row in range(1, 11):
    for col in range(1, 11):
        cell = new_sheet.cell(row=row, column=col)
        cell.value = get_column_letter(col) + str(row)

# Save the workbook
wb.save('example.xlsx')

This code opens an existing workbook called `example.xlsx`, creates a new sheet called `New Sheet`, adds data to it, and saves the modified workbook.