[reportlab-users] How can I edit PDF metadatas

Christian Jacobsen cljacobsen at gmail.com
Mon Nov 30 06:49:03 EST 2009

You can also use pypdf. http://pybrary.net/pyPdf/

This won't let you edit the metadata per se, but will let you read one
or more pdf file(s) and spit them back out, possibly with new
metadata. It is somewhat low level though. I find it useful for
automatically putting PDFs together for various things. I have
included an example below. I often also generate pages with replortlab
(ie separators between the PDFs that I am concatenating) which I
insert into the stream. I use the stringio module to capture the page
from reportlab and then feed it to pypdf's PdfFileReader. I have also
been known to stamp a running page number onto the pages by merging a
reportlab generated page with just a pagenumber with the input page.

pdftk does all of this of course and is probably easier to use.


import pyPdf
from pyPdf import PdfFileWriter, PdfFileReader

OUTPUT = 'output.pdf'
INPUTS = ['test1.pdf', 'test2.pdf', 'test3.pdf']

# There is no interface through pyPDF with which to set this other then getting
# your hands dirty like so:
infoDict = output._info.getObject()
NameObject('/Title'): createStringObject(u'title'),
NameObject('/Author'): createStringObject(u'author'),
NameObject('/Subject'): createStringObject(u'subject'),
NameObject('/Creator'): createStringObject(u'a script')

inputs = [PdfFileReader(i) for i in INPUTS]
for input in inputs:
for page in range(input.getNumPages()):

outputStream = file(OUTPUT, 'wb')

2009/11/26 Andy Robinson <andy at reportlab.com>:

> 2009/11/26 Dani Reguera <drbakhache at gmail.com>:

>> Can I open the file with reportlab and then set its title?


> reportlab creates files, but doesn't edit them.


> pdftk is writing the final file. I just googled it, and it has options

> to set the metadata on the command line.  See 'update_info' on this

> page...

>    http://www.accesspdf.com/pdftk/


> --

> Andy Robinson

> CEO/Chief Architect

> ReportLab Europe Ltd.

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