pdfrw checkbox AS values gets unwanted parentheses

问题

So I'm trying to mark checkboxes in a PDF file with pdfrw. That means changing the checkboxes "AS" value from the default "/Off" to "/Yes". pdfrw is currently forcing parentheses around my "/Yes" when it writes to file, so it doesn't work. How do I keep it from adding these parentheses?

My code:

template_pdf = pdfrw.PdfReader(input_pdf_path)
annotations = template_pdf.pages[0][/Annots]
for annotation in annotations:
    annotation.update(pdfrw.PdfDict(AS="/Yes"))
    pdfrw.PdfWriter().write(output_pdf_path, template_pdf)

My checkboxes in the PDF-file ends up like this, first word in third line is the important one:

1661 0 obj
<</AP <</D <</Off 1845 0 R /Yes 1846 0 R>> /N <</Yes 1847 0 R>>>> /AS
    (/Yes) /F 4 /FT /Btn /MK <</CA (l)>> /P 1608 0 R /Rect
    [101.275 576.22 107.395 584.91] /Subtype /Widget /T (box1) /Type
    /Annot>>
endobj

But to make the check mark actually show up in most PDF-viewers it needs to be like this:

1661 0 obj
<</AP <</D <</Off 1845 0 R /Yes 1846 0 R>> /N <</Yes 1847 0 R>>>> /AS
    /Yes /F 4 /FT /Btn /MK <</CA (l)>> /P 1608 0 R /Rect
    [101.275 576.22 107.395 584.91] /Subtype /Widget /T (box1) /Type
    /Annot>>
endobj

I could always just open the file in python and just replace all the instances of "(/Yes)" with "/Yes", but there has to be some way to get the right values with pdfrw.

回答1:

I think that you might need to use PdfName('Yes') instead of "/Yes":

annotation.update(pdfrw.PdfDict(AS=pdfrw.PdfName('Yes')))

I didn't test this. But it works.

回答2:

annotation.update(pdfrw.PdfDict(V=pdfrw.PdfName('On')))

Above worked for me.

回答3:

template.Root.Pages.Kids[0].Annots[0].update(PdfDict(AS=PdfName('On'), V=PdfName('On')))

来源：https://stackoverflow.com/questions/54526703/pdfrw-checkbox-as-values-gets-unwanted-parentheses

标签

python

pdf

pdfrw