Fill Radio Button Fields

Radio buttons allow users to select a single option from a predefined group, such as gender or preference fields. In this example, the Form facade from the aspose.pdf.facades module is used to bind the source PDF and assign a selected option by its index value. Once the desired option is chosen, the modified document is saved.

1. Initialize pdf_facades.Form() to manage PDF form fields.
2. Call ‘bind_pdf()’ to attach the PDF containing radio button fields.
3. Use ‘fill_field()’ to select the first option (index 0).
4. Save the updated PDF.

from io import FileIO
import sys
from os import path
import aspose.pdf as ap
import aspose.pdf.facades as pdf_facades

sys.path.append(path.join(path.dirname(__file__), ".."))

from config import set_license, initialize_data_dir


# Fill Radio Button Fields
def fill_radio_button_fields(infile, outfile):
    """Fill radio button fields in PDF form."""
    # Create Form object
    pdf_form = pdf_facades.Form()

    # Bind PDF document
    pdf_form.bind_pdf(infile)

    # Fill radio button fields by name
    pdf_form.fill_field("gender", 0)  # Select male option (index 0)
    # pdf_form.fill_field("gender", 1) # Select female option (index 1)

    # Save updated PDF
    pdf_form.save(outfile)