day.py 文件源码

def render_pdf(self):
        outpdf = PdfFileWriter()
        for page in self.pages:
            if page.extension == "pdf":
                # the page is already a PDF so append directly
                outpdf.addPage(PdfFileReader(BytesIO(page.binary)).getPage(0))
            else:
                # otherwise, the page is an image that needs to be converted to PDF first
                buf = BytesIO()
                img = Image.open(BytesIO(page.binary))
                img.convert("RGB").save(buf, format="pdf")
                # once image is PDF, it can be appended
                outpdf.addPage(PdfFileReader(buf).getPage(0))

        pdf_page_buf = BytesIO()
        outpdf.write(pdf_page_buf)
        return(pdf_page_buf.getvalue())