Version 4.3.0 writer unable to fill Dropdown fields

[chrischanwz]

I am trying to fill PDF Form fields. I note that this issue has been mentioned in #2611 and #2614. I used the dev version 4.3.0 of PyPdf and it seems my Dropdown fields are still not being filled. unfortunately I cannot provide the actual PDF file due to my company's policies. However, I can confirm that the Fields I am trying to fill are Dropdown (/Ch) type. The other Tx fields are being filled up fine.

$ python -m platform
# TODO: Your output goes here

$ python -c "import pypdf;print(pypdf._debug_versions)"
# TODO: Your output goes here

Code + PDF

This is the code I use to write and fill the form fields. I am reading data from an excel sheet. the handle_bom function is there to solve an error when I try to run my code: AttributeError: ' float object has no attribute 'startswith'. (this Error did not occur in 4.2.0, though)

def handle_bom(value):
    if isinstance(value, str) and value.startswith(("\xfe\xff", "\xff\xfe")):
        value = value.encode('latin1').decode('utf-16')
    return value

# other code omitted
with open(pdf_file_base, "rb") as file:
        reader = PdfReader(file)
        writer = PdfWriter()
        writer.append(reader)  

        for i, (index, row) in enumerate(group.iterrows()):   
             data_to_fill = row.to_dict()
             data_to_fill = {key: handle_bom(str(value)) for key, value in data_to_fill.items()}  


             page = writer.pages[i] 
             writer.update_page_form_field_values(page, data_to_fill, auto_regenerate=True,)

This is one such example of my dropdown field.

[stefan6419846]

There are two issues:

• The BOM handling should not be required. This most likely is related to BUG: Fix images issue 4 bits encoding and LUT starting with UTF16_BOM #2675 and might require an example for reproduction.
• Could you please make your code self-contained and reproducible by providing fixed data and a corresponding PDF file for analysis?

[chrischanwz]

Apologies, the dropdown fields are being filled as intended. Thank you so much for the help!