PyPDF2 PdfFileWriter没有属性流

Question

我正在尝试将pdf分成多个页面，并将每个页面另存为一个新的pdf。我尝试了上一个问题中的this方法，但没有成功，也尝试了here中的pypdf2拆分示例，但没有成功。编辑:我可以在我的文件中看到它成功地写入了第一页，然后创建了第二页pdf，但它是空的。

下面是我尝试运行的代码：

from PyPDF2 import PdfFileWriter, PdfFileReader

inputpdf = PdfFileReader(open("my_pdf.pdf", "rb"))

for i in range(inputpdf.numPages):
    output = PdfFileWriter()
    output.addPage(inputpdf.getPage(i))
    with open("document-page%s.pdf" % i, "wb") as outputStream:
        output.write(outputStream)

以下是完整的错误消息：

Traceback (most recent call last):
  File "pdf_functions.py", line 9, in <module>
    output.write(outputStream)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 482, in write
    self._sweepIndirectReferences(externalReferenceMap, self._root)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 572, in _sweepIndirectReferences
    self._sweepIndirectReferences(externMap, realdata)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 548, in _sweepIndirectReferences
    value = self._sweepIndirectReferences(externMap, value)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 572, in _sweepIndirectReferences
    self._sweepIndirectReferences(externMap, realdata)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 548, in _sweepIndirectReferences
    value = self._sweepIndirectReferences(externMap, value)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 557, in _sweepIndirectReferences
    value = self._sweepIndirectReferences(externMap, data[i])
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 572, in _sweepIndirectReferences
    self._sweepIndirectReferences(externMap, realdata)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 548, in _sweepIndirectReferences
    value = self._sweepIndirectReferences(externMap, value)
  File "/usr/local/lib/python3.4/dist-packages/PyPDF2/pdf.py", line 575, in _sweepIndirectReferences
    if data.pdf.stream.closed:
AttributeError: 'PdfFileWriter' object has no attribute 'stream'

我也尝试了一下，并确认我确实可以提取一个页面。

from PyPDF2 import PdfFileWriter, PdfFileReader
inputpdf = PdfFileReader(open("/home/ubuntu/inputs/cityshape/form5.pdf", "rb"))

#for i in range(inputpdf.numPages):
output = PdfFileWriter()
output.addPage(inputpdf.getPage(2))
with open("document-page2.pdf", "wb") as outputStream:
    output.write(outputStream)

Answer 1

同样的事情也发生在我身上。

我可以通过在循环中移动以下代码行来解决这个问题：

inputpdf = PdfFileReader(open("/home/ubuntu/inputs/cityshape/form5.pdf", "rb"))

我认为PyPDF2的某些版本有某种错误，当您调用PdfFileWriter.write方法时，它会扰乱PdfFileReader实例。通过在每次写入后重新创建PdfFileReader实例，它绕过了这个错误。

下面的代码应该可以工作(未经测试)：

from PyPDF2 import PdfFileWriter, PdfFileReader

pdf_in_file = open("my_pdf.pdf",'rb')

inputpdf = PdfFileReader(pdf_in_file)
pages_no = inputpdf.numPages

for i in range(pages_no):
    inputpdf = PdfFileReader(pdf_in_file)
    output = PdfFileWriter()
    output.addPage(inputpdf.getPage(i))
    with open("document-page%s.pdf" % i, "wb") as outputStream:
        output.write(outputStream)

pdf_in_file.close()