How to set radiobutton values

[fernandesjeevan]

Hey guys i have to fill pdf using data from json file, so far i have been able to do it for textfield,dropdown boxes, checkboxes as it was straightforward, I have not been able to fill out radio buttons with it.
sample_pdf 3.pdf

field_values = {
    'radio_fields': {
        'Group6': 'Choice1',  
        
    }
}
for i in range(len(page["/Annots"])):
    annotation = page["/Annots"][i].get_object()
    actual_field_name = str(annotation.get('/T'))

    # Update radio button fields
    if actual_field_name in field_values['radio_fields']:
        selected_option = field_values['radio_fields'][actual_field_name]
        annotation.update({
            NameObject('/V'): NameObject(selected_option),
            NameObject('/AS'): NameObject(selected_option)
        })

I have tried this, I don't know whether it is correct, and also this,
hobby = "reading" if hobby=="reading": writer.update_page_form_field_values(writer.pages[0],{'Choice1':"/Yes"})

here is the radiobutton object of the pdf
'Group6': {'/T': 'Group6', '/FT': '/Btn', '/Ff': 49152, '/Kids': [IndirectObject(80, 0, 2808974460832), IndirectObject(81, 0, 2808974460832), IndirectObject(82, 0, 2808974460832), IndirectObject(83, 0, 2808974460832)], '/Opt': ['Choice1', 'Choice1', 'Choice1', 'Choice1']}}

can you please help me out on this, I am very new to this.

[pubpub-zz]

first please ensure you are on the latest build
as you want to modify the doc you should directly create a PdfWriter object:
w =pypdf.PdfWriter("e:/Downloads/sample_pdf.3.pdf")

if you run w.get_fields() you will get:
{'Name': {'/T': 'Name', '/FT': '/Tx', '/TU': 'Please enter your name here', '/Ff': 8388608}, 'Address': {'/T': 'Address', '/FT': '/Tx', '/TU': 'Please enter your address here', '/Ff': 8388608}, 'Dropdown1': {'/T': 'Dropdown1', '/FT': '/Ch', '/TU': 'Please select the day of the month here', '/Ff': 131072, '/V': '1', '/DV': '1', '/Opt': ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31'], '/States': ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31']}, 'Dropdown2': {'/T': 'Dropdown2', '/FT': '/Ch', '/TU': 'Please select a month here', '/Ff': 131072, '/V': 'Jan', '/DV': 'Jan', '/Opt': ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'], '/States': ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']}, 'Dropdown3': {'/T': 'Dropdown3', '/FT': '/Ch', '/TU': 'Please select a year here', '/Ff': 131072, '/V': '2012', '/DV': '2012', '/Opt': ['2012', '2013', '2014', '2015', '2016', '2017', '2018', '2019', '2020', '2021', '2022', '2023', '2024', '2025'], '/States': ['2012', '2013', '2014', '2015', '2016', '2017', '2018', '2019', '2020', '2021', '2022', '2023', '2024', '2025']}, 'Check Box4': {'/T': 'Check Box4', '/FT': '/Btn', '/States': ['/Off', '/Yes']}, 'Check Box1': {'/T': 'Check Box1', '/FT': '/Btn', '/States': ['/Off', '/Yes']}, 'Check Box3': {'/T': 'Check Box3', '/FT': '/Btn', '/States': ['/Off', '/Yes']}, 'Check Box2': {'/T': 'Check Box2', '/FT': '/Btn', '/States': ['/Off', '/Yes']}, 'Text5': {'/T': 'Text5', '/FT': '/Tx', '/TU': 'Please enter your favourite activity here', '/Ff': 12582912}, 'Button7': {'/T': 'Button7', '/FT': '/Btn', '/TU': 'Click here to save this document', '/Ff': 65536, '/Kids': [IndirectObject(85, 0, 1608463209168), IndirectObject(86, 0, 1608463209168)]}, 'Text6': {'/T': 'Text6', '/FT': '/Tx', '/TU': 'Please enter your favourite activity here', '/Ff': 12582912}, 'Group6': {'/T': 'Group6', '/FT': '/Btn', '/Ff': 49152, '/Kids': [IndirectObject(80, 0, 1608463209168), IndirectObject(81, 0, 1608463209168), IndirectObject(82, 0, 1608463209168), IndirectObject(83, 0, 1608463209168)], '/Opt': ['Choice1', 'Choice1', 'Choice1', 'Choice1'], '/States': ['/0', '/1', '/2', '/3']}}

for group6, your pdf shows all the same names for the diffrent options, you have then to use the values from States:
w.update_page_form_field_values(None, {"Group6":"/1"})

[pubpub-zz]

Your code is wrong:

w =pypdf.PdfWriter("sample_pdf.3.pdf") 
w.update_page_form_field_values(0, {"Group6":"/1"})

[fernandesjeevan]

w =pypdf.PdfWriter("sample_pdf.3.pdf")
w.update_page_form_field_values(0, {"Group6":"/1"})

  File "C:\Users\jeeva\Downloads\fastapitutorial\pypdf2radio.py", line 3, in <module>
    w.update_page_form_field_values(0, {"Group6":"/1"})
  File "C:\Users\jeeva\Downloads\fastapitutorial\myenv\Lib\site-packages\pypdf\_writer.py", line 827, in update_page_form_field_values
    if PG.ANNOTS not in page:
       ^^^^^^^^^^^^^^^^^^^^^
TypeError: argument of type 'int' is not iterable

[pubpub-zz]

And what about
w.update_page_form_field_values(None, {"Group6":"/1"})

[pubpub-zz]

My Fault (I was missing my computer to perform the test):

w =pypdf.PdfWriter("sample_pdf.3.pdf")
w.update_page_form_field_values(w.pages[0],{"Group6":"/1"})

else

w =pypdf.PdfWriter("sample_pdf.3.pdf")
w.update_page_form_field_values(None,{"Group6":"/1"})