通常,您可能需要在現有PDF 文件中新增其他文字。幸運的是,Python 提供了幾個可以簡化此任務的模組。然而,識別與 Windows 和 Linux 系統相容的模組很重要。
在考慮各種選項後,兩個合適的模組是 PyPDF2 和PyPDF。這些模組提供高水準的功能和跨平台支援。
以下是 Python 2.7 和 Python 3 的程式碼範例。 x:
<code class="python">from pyPdf import PdfFileWriter, PdfFileReader import StringIO from reportlab.pdfgen import canvas from reportlab.lib.pagesizes import letter packet = StringIO.StringIO() can = canvas.Canvas(packet, pagesize=letter) can.drawString(10, 100, "Hello world") can.save() # Move to the beginning of the StringIO buffer packet.seek(0) # Create a new PDF with Reportlab new_pdf = PdfFileReader(packet) # Read your existing PDF existing_pdf = PdfFileReader(file("original.pdf", "rb")) output = PdfFileWriter() # Add the "watermark" (which is the new pdf) on the existing page page = existing_pdf.getPage(0) page.mergePage(new_pdf.getPage(0)) output.addPage(page) # Finally, write "output" to a real file outputStream = file("destination.pdf", "wb") output.write(outputStream) outputStream.close()</code>
<code class="python">from PyPDF2 import PdfFileWriter, PdfFileReader import io from reportlab.pdfgen import canvas from reportlab.lib.pagesizes import letter packet = io.BytesIO() can = canvas.Canvas(packet, pagesize=letter) can.drawString(10, 100, "Hello world") can.save() # Move to the beginning of the StringIO buffer packet.seek(0) # Create a new PDF with Reportlab new_pdf = PdfFileReader(packet) # Read your existing PDF existing_pdf = PdfFileReader(open("original.pdf", "rb")) output = PdfFileWriter() # Add the "watermark" (which is the new pdf) on the existing page page = existing_pdf.pages[0] page.merge_page(new_pdf.pages[0]) output.addPage(page) # Finally, write "output" to a real file output_stream = open("destination.pdf", "wb") output.write(output_stream) output_stream.close()</code>
這些程式碼範例會將文字「Hello world」新增至現有PDF 檔案的第一頁,並將結果儲存到新的PDF 檔案中。您可以相應地自訂文字和位置。
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