如何获取PDF的书签并将书签添加到新的pdf中？

我正在将一个 PDF 合并到其他 PDF，它工作正常，但最终 PDF 中缺少书签。

以下是PDF生成代码：

#- Create One Page PDF with some text
from reportlab.pdfgen import canvas as canx
c = canx.Canvas('transparent.pdf')
c.setStrokeColor((1, 0, 0))
transparentwhite = canx.Color(255, 255, 255, alpha = 0.0)
c.setFillColor(transparentwhite)
t = c.beginText()
t.setTextRenderMode(2)
c._code.append(t.getCode())
c.setFont('Helvetica', 48)
c.saveState()
c.translate(100, 100)
c.rotate(45)
c.drawCentredString(500, 100, 'DRAFT')
c.save()

以下是合并代码：

#- Merge PDF.
transparentbannerfile = open('transparent.pdf', 'rb')
testpagefile = open('NOID_body20160202T133650.pdf', 'rb')
outputfile = open('mergedtransparent.pdf', 'wb')
import PyPDF2 as pdf
readerbanner = pdf.PdfFileReader(transparentbannerfile)
readertestpages = pdf.PdfFileReader(testpagefile)
bannerpage = readerbanner.getPage(0)
writeroutput = pdf.PdfFileWriter()
for x in xrange(readertestpages.getNumPages()):
  pagex = readertestpages.getPage(x)
  pagex.mergePage(bannerpage)
  writeroutput.addPage(pagex)

writeroutput.write(outputfile)
outputfile.close()
transparentbannerfile.close()
testpagefile.close()

但书签丢失，元数据中也丢失标题。

什么是'bookmarkHorizontal', 'bookmarkHorizontalAbsolute', 'bookmarkPage'的方法canvas object?

同样的问题也在这里如何给PDF文件添加书签？ https://stackoverflow.com/questions/27041096/how-to-add-bookmarks-to-pdf-file

我可以从以下代码中获取标题：

from pyPdf import PdfFileReader
pdf_toread = PdfFileReader(open('NOID_body20160202T133650.pdf', "rb"))
pdf_info = pdf_toread.getDocumentInfo()
print pdf_info

将标题设置为新 PDFsetTitle method

#- Create One Page PDF with some text
from reportlab.pdfgen import canvas as canx
c = canx.Canvas('transparent.pdf')
c.setTitle("Test to set Title")

Or:

import PyPDF2 as pdf
writeroutput = pdf.PdfFileWriter()
writeroutput.addMetadata({'/Title': u'Print Page Sizes'})

BookMark

1. 首先从输入pdf这些代码中获取书签如何获取书签的页码 https://stackoverflow.com/questions/8329748/how-to-get-bookmarks-page-number

2. 以下代码将书签添加到新的 PDF：

`

transparentbannerfile = open('transparent.pdf', 'rb')
testpagefile = open('NOID_body20160202T133650.pdf', 'rb')
outputfile = open('mergedtransparent112.pdf', 'wb')
import PyPDF2 as pdf
from collections import OrderedDict
readerbanner = pdf.PdfFileReader(transparentbannerfile)
readertestpages = pdf.PdfFileReader(testpagefile)
bannerpage = readerbanner.getPage(0)
writeroutput = pdf.PdfFileWriter()
for x in xrange(readertestpages.getNumPages()):
    pagex = readertestpages.getPage(x)
    pagex.mergePage(bannerpage)
    writeroutput.addPage(pagex)

a = OrderedDict([(u'SIDDHARTHA', {'top': 750, 'left': 0, 'page': 1, 'title': u'SIDDHARTHA'}), (u'Chapter 01', {'top': 750, 'left': 0, 'page': 3, 'title': u'Chapter 01'}), (u'Chapter 02', {'top': 503, 'left': 0, 'page': 6, 'title': u'Chapter 02'}), (u'Chapter 03', {'top': 340, 'left': 0, 'page': 11, 'title': u'Chapter 03'}), (u'Chapter 04', {'top': 231, 'left': 0, 'page': 17, 'title': u'Chapter 04'}), (u'Chapter 05', {'top': 909, 'left': 0, 'page': 30, 'title': u'Chapter 05'}), (u'Chapter 06', {'top': 614, 'left': 0, 'page': 32, 'title': u'Chapter 06'}), (u'Chapter 07', {'top': 417, 'left': 0, 'page': 35, 'title': u'Chapter 07'}), (u'Chapter 08', {'top': 289, 'left': 0, 'page': 41, 'title': u'Chapter 08'})])
for i in a:
    writeroutput.addBookmark(i, a[i]["page"]-1, a[i])

writeroutput.write(outputfile)
outputfile.close()
transparentbannerfile.close()
testpagefile.close()

`

现在如何处理嵌套书签:)??