from ironxl import *

# Load the Excel workbook
workbook = WorkBook.Load("sample.xlsx")
worksheet = workbook.DefaultWorkSheet

# Open a protected spreadsheet file
protected_workbook = WorkBook.Load("sample.xlsx", "IronSoftware")

# Spreadsheet protection
# Set protection for the spreadsheet file
workbook.Encrypt("IronSoftware")

# Remove protection for the spreadsheet file. Original password is not required.
workbook.Password = None

workbook.Save()

# Worksheet protection
# Set protection for an individual worksheet
worksheet.ProtectSheet("IronXL")

# Remove protection for a particular worksheet. It works without a password!
worksheet.UnprotectSheet()

workbook.Save()