AttributeError: 'Worksheet' object has no attribute 'save'

This error occurs when you try to call the `save` method on a `Worksheet` object in Python, which does not have this attribute.

The `save` method is typically used with `Workbook` objects in the `openpyxl` library to save changes to an Excel file.

To fix this error, make sure you are calling the `save` method on a `Workbook` object, not a `Worksheet` object.

Here's an example of how to save changes to an Excel file using `openpyxl`:

from openpyxl import Workbook

# create a new workbook object
wb = Workbook()

# select the active worksheet
ws = wb.active

# add some data to the worksheet
ws['A1'] = 'Hello'
ws['B1'] = 'World'

# save the changes to the workbook
wb.save('example.xlsx')

In this example, we create a new workbook object, select the active worksheet, add some data to it, and then call the `save` method on the `Workbook` object to save the changes to the file.