python pypdf function to add bookmarks

[standenman]

I have the following code to recast a set of medical records so that the new PDF has bookmarks that reflect the date of medical treatment. The code creates a new PDF (porejemplo.pdf) but when I open it I there are no bookmarks. what am I missing?

import re
import pypdf
# Open the PDF file for reading
pdf_file = open("C:/Users/stand/Downloads/MyClientVisitDates.pdf", 'rb')
pdf_reader = pypdf.PdfReader(pdf_file)
pdf_writer = pypdf.PdfWriter()
# Define the regular expression for finding the bookmark locations
regex = re.compile(r'Visit date: \b\d{2}/\d{2}/\d{4}\b')

# Iterate through the pages of the PDF
for i in range(len(pdf_reader.pages)):
   page = pdf_reader.pages[i]
   text = page.extract_text()
   matches = re.finditer(regex, text)
   pdf_writer.add_page(page)
   
   for match in matches:
    pdf_writer.add_outline_item( title=matches, page_number=page)
    
 
 
# Write the new PDF file with bookmarks
output_file = open('porejemplo.pdf', 'wb')
pdf_writer.write(output_file)
output_file.close()
pdf_file.close()

[carecavoador]

I have the following code to recast a set of medical records so that the new PDF has bookmarks that reflect the date of medical treatment. The code creates a new PDF (porejemplo.pdf) but when I open it I there are no bookmarks. what am I missing?

import re
import pypdf
# Open the PDF file for reading
pdf_file = open("C:/Users/stand/Downloads/MyClientVisitDates.pdf", 'rb')
pdf_reader = pypdf.PdfReader(pdf_file)
pdf_writer = pypdf.PdfWriter()
# Define the regular expression for finding the bookmark locations
regex = re.compile(r'Visit date: \b\d{2}/\d{2}/\d{4}\b')

# Iterate through the pages of the PDF
for i in range(len(pdf_reader.pages)):
   page = pdf_reader.pages[i]
   text = page.extract_text()
   matches = re.finditer(regex, text)
   pdf_writer.add_page(page)
   
   for match in matches:
    pdf_writer.add_outline_item( title=matches, page_number=page)
    
 
 
# Write the new PDF file with bookmarks
output_file = open('porejemplo.pdf', 'wb')
pdf_writer.write(output_file)
output_file.close()
pdf_file.close()

The function re.finditer() returns a iterator of Match objects. You need to pass a string to the pdf_writer.add_outline_item() function as title parameter.

Also, consider using enumerate to iterate over the PDF pages:

for page_number, page in enumerate(pdf_reader.pages):
    text = page.extract_text()
    matches = re.finditer(regex, text)
    # You still need to deal with matches here, as you need to pass a string
    # to pdf_writer.add_outline_item() as a title.
    pdf_writer.add_page(page)

    for match in matches:
        pdf_writer.add_outline_item(title=matches, page_number=page_number)

[standenman]

Thanks for your response. Still getting a pdf without bookmarks, plus errors in my terminal of the form:

[0, IndirectObject(652, 0, 1775950030224)]
unknown widths :

With this code:

import re
import pypdf
# Open the PDF file for reading
pdf_file = open("C:/Users/stand/Downloads/SusanJonesVisitDate.pdf", 'rb')
pdf_reader = pypdf.PdfReader(pdf_file)
pdf_writer = pypdf.PdfWriter()
# Define the regular expression for finding the bookmark locations
regex = re.compile(r'Visit date: \b\d{2}/\d{2}/\d{4}\b')
 
for page_number, page in enumerate(pdf_reader.pages):
    text = page.extract_text()
    matches = re.finditer(regex, text)
    # You still need to deal with matches here, as you need to pass a string
    # to pdf_writer.add_outline_item() as a title.
    pdf_writer.add_page(page)
 
    for match in matches:
        pdf_writer.add_outline_item(title=matches, page_number=page_number)

 
  
# Write the new PDF file with bookmarks
output_file = open('porejemplo22.pdf', 'wb')
pdf_writer.write(output_file)
output_file.close()
pdf_file.close()