Search code examples
pythonpypdf

PyPDF2 writer function creates blank page

Trying to write a function to combine pages in a PDF document. Streaming the output creates a blank page for an unknown reason Here is the test case

from PyPDF2 import PdfReader, PdfWriter

dr = r"C:\GC"
ldr = dr + r"\12L.pdf"
writer = PdfWriter()

with open(ldr, "rb") as f:
    reader = PdfReader(f)
    page = reader.pages[0]
    writer.add_page(page)
    f.close()

with open(dr + r"\new.pdf", "wb") as output_stream:
    writer.write(output_stream)
    output_stream.close()

Edit: I made some changes to my PE and got more information.

writer.write(output_stream)

raises the error

ValueError: I/O operation on closed file: C:\GC\12L.pdf

I did some troubleshooting with keeping the reader file open and changing syntax to suggestions and I still raise the error.

Solution

  • Since you're using a context manager, you don't need to explicitly call .close(). Try this:

    from PyPDF2 import PdfReader, PdfWriter

dr = r"C:\GC"
ldr = dr + r"\12L.pdf"
writer = PdfWriter()

with open(ldr, "rb") as f:
  reader = PdfReader(f)
  page = reader.pages[0]
  writer.add_page(page)
  
  with open(dr + r"\new.pdf", "wb") as output_stream:
    writer.write(output_stream)