Python rotate pdf pages

    import PyPDF2

    pdf_in = open('original.pdf', 'rb')
    pdf_reader = PyPDF2.PdfFileReader(pdf_in)
    pdf_writer = PyPDF2.PdfFileWriter()

    for pagenum in range(pdf_reader.numPages):
        page = pdf_reader.getPage(pagenum)
        page.rotateClockwise(180)
        pdf_writer.addPage(page)

    pdf_out = open('rotated.pdf', 'wb')
    pdf_writer.write(pdf_out)
    pdf_out.close()
    pdf_in.close()

Source: johndcook.com

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