How to use Range.RemoveSubtotal in the xlwings API way

The RemoveSubtotal method in the Excel object model is a member of the Range object. It is used to remove subtotals that have been previously applied to a list or range of data within an Excel worksheet. Subtotals are typically created using Excel’s built-in Subtotal feature, which groups data and inserts summary rows with functions like SUM, COUNT, or AVERAGE. The RemoveSubtotal method clears these groupings and summary rows, restoring the range to its original state without the subtotal calculations and outline structure. This is particularly useful when cleaning up data or preparing it for different analysis after subtotals are no longer needed.

In xlwings, the RemoveSubtotal method can be accessed through the api property of a Range object, which provides direct access to the underlying Excel object model. The syntax for calling this method in xlwings is straightforward, as it does not require any parameters. The method is called on a Range object that represents the entire range where subtotals are applied, and it removes all subtotals within that range.

The xlwings API call format is:
range.api.RemoveSubtotal()
Here, range is an xlwings Range object (e.g., sheet.range('A1:D100')). The method does not take any arguments, and it does not return a value. It directly modifies the worksheet by removing subtotals. It is important to note that if no subtotals exist in the specified range, calling this method will have no effect and will not raise an error.

For example, consider an Excel worksheet where subtotals have been applied to a dataset in the range A1:D50 to summarize sales data by region. To remove these subtotals using xlwings, you would first connect to the workbook and worksheet, then call the RemoveSubtotal method on the appropriate range. Below is a code instance demonstrating this:

import xlwings as xw

# Connect to the active workbook and sheet (adjust as needed)
wb = xw.books.active
sheet = wb.sheets['Sheet1']

# Define the range where subtotals are applied
subtotal_range = sheet.range('A1:D50')

# Remove subtotals from the range
subtotal_range.api.RemoveSubtotal()

# Save the workbook if changes are to be persisted
wb.save()