How to use Application.Creator in the xlwings API way

The Creator property of the Application object in Excel’s object model is a read-only attribute that returns a 32-bit integer representing the application that created the file. In Excel, this value is typically used to identify whether the file was created by Microsoft Excel or another application, such as a third-party tool or a different version of Excel. In xlwings, the Creator property can be accessed to retrieve this identifier, which can be useful for compatibility checks, file validation, or logging purposes when automating Excel tasks.

Functionality:
The Creator property helps determine the origin application of an Excel file. For instance, if a file was created by Excel, the Creator value will correspond to Microsoft Excel’s identifier. This can be essential in scenarios where you need to ensure that files are processed only from specific sources or to troubleshoot issues related to file creation.

Syntax in xlwings:
In xlwings, you can access the Creator property through the app object, which represents the Excel application. The syntax is straightforward, as it is a property without parameters. Here’s the general format:

creator_value = app.api.Creator

• app: This is the xlwings App instance connected to Excel.
• api: This attribute provides access to the underlying Excel object model, allowing direct interaction with properties like Creator.
• Creator: The property that returns an integer representing the creator application.

The returned value is an integer. For Microsoft Excel, the typical value is 1480803660 (which corresponds to the hexadecimal 0x5843454C, representing “XCEL” in ASCII). Other applications may have different values. You can compare this integer to known constants to identify the creator.

Example Usage:
Below is a code example that demonstrates how to use the Creator property in xlwings to check if the current Excel file was created by Microsoft Excel. This example assumes you have an Excel application open and connected via xlwings.

import xlwings as xw

# Connect to the active Excel application
app = xw.apps.active

# Access the Creator property
creator_code = app.api.Creator

# Define known creator codes (example for Microsoft Excel)
EXCEL_CREATOR = 1480803660 # This is the standard value for Excel

# Check the creator and print the result
if creator_code == EXCEL_CREATOR:
    print("The file was created by Microsoft Excel.")
else:
    print(f"The file was created by another application. Creator code: {creator_code}")

# You can also convert the code to a hexadecimal string for easier interpretation
hex_creator = hex(creator_code)
print(f"Creator code in hexadecimal: {hex_creator}")