使用Python将文本添加到现有PDF

Question

我需要使用Python为现有PDF添加一些额外的文本,这是最好的方法,我需要安装哪些额外的模块.

注意:理想情况下,我希望能够在Windows和Linux上运行它,但只有推动Linux才能实现.

编辑:pyPDF和ReportLab看起来不错,但是没有人允许我编辑现有的PDF,还有其他选择吗？

Answer 1

[Python 2.7]的示例:

from pyPdf import PdfFileWriter, PdfFileReader
import StringIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter

packet = StringIO.StringIO()
# create a new PDF with Reportlab
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)
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()

Python 3.x的示例:

from PyPDF2 import PdfFileWriter, PdfFileReader
import io
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter

packet = io.BytesIO()
# create a new PDF with Reportlab
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)
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.getPage(0)
page.mergePage(new_pdf.getPage(0))
output.addPage(page)
# finally, write "output" to a real file
outputStream = open("destination.pdf", "wb")
output.write(outputStream)
outputStream.close()

Answer 2

我知道这是一篇较老的帖子,但我花了很长时间试图找到解决方案.我只使用ReportLab和PyPDF遇到了一个不错的人,所以我想我会分享:

1. 使用读取您的PDF PdfFileReader(),我们将调用此输入
2. 创建一个包含要使用ReportLab添加的文本的新pdf,将其另存为字符串对象
3. 使用读取字符串对象PdfFileReader(),我们将调用此文本
4. 使用创建一个新的PDF对象PdfFileWriter(),我们将调用此输出
5. 迭代输入并应用.mergePage(*text*.getPage(0))您希望文本添加到的每个页面,然后使用output.addPage()将修改后的页面添加到新文档

这适用于简单的文本添加.请参阅PyPDF的样本,以便为文档添加水印.

以下是一些代码来回答以下问题:

packet = StringIO.StringIO()
can = canvas.Canvas(packet, pagesize=letter)
<do something with canvas>
can.save()
packet.seek(0)
input = PdfFileReader(packet)

从这里,您可以将输入文件的页面与另一个文档合并.

Answer 3

pdfrw将允许您从现有PDF中读取页面并将它们绘制到reportlab画布(类似于绘制图像).在github上的pdfrw examples/rl1子目录中有这样的例子.免责声明:我是pdfrw作者.

Answer 4

cpdf将从命令行完成这项工作。不过，它不是python（afaik）：

cpdf -add-text "Line of text" input.pdf -o output .pdf

Answer 5

利用David Dehghan的上述答案,以下内容适用于Python 2.7.13:

from PyPDF2 import PdfFileWriter, PdfFileReader, PdfFileMerger

import StringIO

from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter

packet = StringIO.StringIO()
# create a new PDF with Reportlab
can = canvas.Canvas(packet, pagesize=letter)
can.drawString(290, 720, "Hello world")
can.save()

#move to the beginning of the StringIO buffer
packet.seek(0)
new_pdf = PdfFileReader(packet)
# read your existing PDF
existing_pdf = PdfFileReader("original.pdf")
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 = open("destination.pdf", "wb")
output.write(outputStream)
outputStream.close()