Question

I need to fill out a PFD form then flatten it as apparently that’s how you make the form uneditable but I just can’t get it done. How do I take the output stream and save it as a PDF?

I have found a solution for the BytesIO output which is

with open('out.pdf', 'wb') as f:
    f.write(output_stream.getvalue())

But still get a PDF with editable forms when you look at it. The odd thing is that nothing has been written to the PDF in preview but when you open it and click on the form spaces my data actually comes through. I just want to flatten it.

The code

from io import BytesIO
import PyPDF2
from PyPDF2.generic import BooleanObject, NameObject, IndirectObject, NumberObject
def set_need_appearances_writer(writer):
# basically used to ensured there are not
# overlapping form fields, which makes printing hard
try:
catalog = writer._root_object
# get the AcroForm tree and add "/NeedAppearances attribute
if "/AcroForm" not in catalog:
writer._root_object.update({
NameObject("/AcroForm"): IndirectObject(len(writer._objects), 0, writer)})
    need_appearances = NameObject("/NeedAppearances")
    writer._root_object["/AcroForm"][need_appearances] = BooleanObject(True)


except Exception as e:
    print('set_need_appearances_writer() catch : ', repr(e))

return writer  
open the pdf
input_stream = open("JMA.pdf", "rb")
pdf_reader = PyPDF2.PdfFileReader(input_stream, strict=False)
if "/AcroForm" in pdf_reader.trailer["/Root"]:
pdf_reader.trailer["/Root"]["/AcroForm"].update(
{NameObject("/NeedAppearances"): BooleanObject(True)})
pdf_writer = PyPDF2.PdfFileWriter()
set_need_appearances_writer(pdf_writer)
if "/AcroForm" in pdf_writer._root_object:
# Acro form is form field, set needs appearances to fix printing issues
pdf_writer._root_object["/AcroForm"].update(
{NameObject("/NeedAppearances"): BooleanObject(True)})
#data_dict = dict() # this is a dict of your form values
data_dict = {
'name': 'Jason allen',
'addressf': 'Test address',
}
pdf_writer.addPage(pdf_reader.getPage(0))
page = pdf_writer.getPage(0)
update form fields
pdf_writer.updatePageFormFieldValues(page, data_dict)
for j in range(0, len(page['/Annots'])):
writer_annot = page['/Annots'][j].getObject()
for field in data_dict:
if writer_annot.get('/T') == field:
writer_annot.update({
NameObject("/Ff"): NumberObject(1) # make ReadOnly
})
output_stream = BytesIO()
pdf_writer.write(output_stream)
output_stream is your flattened pdf
print(output_stream)

Flatten PDF in pure Python

0 个答案: