Init

.gitignore

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+venv/
+input.pdf
+output.pdf
+.DS_Store

README.md

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+# Split pdf pages
+
+![zac cover](cover.png)
+
+There is this book i want to print, but the pages are already coupled 2 by 2 and so the booklet printing doesn't work.
+
+This script uses [pypdf2](https://pypdf2.readthedocs.io/en/latest/user/cropping-and-transforming.html) to crop and transform the a4 horizontal pages of the pdf into 2 a5 vertical ones.
+
+Good way to procrastinate eh
+
+## Usage
+
+First install the requirements (actually just PyPDF2)
+
+`pip install -r requirements.txt`
+
+The script takes a `input.pdf` and gives out a `output.pdf`.
+
+Then run the code.
+
+`python3 zac.py`

requirements.txt

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+PyPDF2==2.11.1
+typing-extensions==4.4.0

zac.py

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+from PyPDF2 import PdfWriter, PdfReader, PageObject
+
+reader = PdfReader('input.pdf')
+writer = PdfWriter()
+
+for index, page in enumerate(reader.pages):
+    if index != 0 and index != len(reader.pages)-1:
+        
+        offset = page.mediabox.right / 2
+
+        # hack to clone the page as a copy not reference
+        # https://github.com/py-pdf/PyPDF2/issues/100#issuecomment-378890266
+        left_page = PageObject.createBlankPage(None, page.mediaBox.getWidth(), page.mediaBox.getHeight())
+        left_page.mergePage(page)
+
+        left_page.mediabox.right = offset
+        writer.add_page(left_page)
+
+
+        right_page = PageObject.createBlankPage(None, page.mediaBox.getWidth(), page.mediaBox.getHeight())
+        right_page.mergePage(page)
+
+        right_page.mediabox.left = offset
+        writer.add_page(right_page)
+
+    else:
+        writer.add_page(page)
+
+
+with open("output.pdf", "wb") as fp:
+    writer.write(fp)