Set Field Comb Number

The comb number defines how the field’s content is split into equally spaced boxes, often used for PIN codes, serial numbers, or other fixed-length input fields. The code opens an existing PDF, sets the comb number for a field, and saves the modified document.

The FormEditor class provides the ‘set_field_comb_number’ method to define the number of boxes (characters) in a form field.

1. Open an existing PDF form.
2. Creates a FormEditor object.
3. Set the comb number of a field named “PIN” to 5.
4. Save the updated document.

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

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

from config import set_license, initialize_data_dir


def set_field_comb_number(infile, outfile):
    # Open document
    doc = ap.Document(infile)

    # Create FormEditor object
    form_editor = pdf_facades.FormEditor(doc)

    # Set field comb number to 5
    form_editor.set_field_comb_number("PIN", 5)

    # Save updated document
    form_editor.save(outfile)