保存使用 PyPDF2 生成的 pdf 文件時 python 中的斷言錯誤

Question

我想將給定的 PDF 頁面拆分為單獨的 PDF。

這是我寫的代碼，但在此，使用open()和.write()函數保存文件時出現錯誤：AssertionError

from PyPDF2 import PdfFileReader, PdfFileWriter

pdf = PdfFileReader("input.pdf")   # this is the source pdf
for page in range(pdf.getNumPages()):
    pdf_writer = PdfFileWriter()
    pdf_writer.addPage(pdf.getPage(page))

    output = f'output{page}.pdf'  # getting pdf name to be saved as
    with open(output, 'wb') as output_pdf:
        pdf_writer.write(output_pdf)

這是完整的錯誤：

Traceback (most recent call last):
  File "test.py", line 11, in <module>
    pdf_writer.write(output_pdf)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 482, in write
    self._sweepIndirectReferences(externalReferenceMap, self._root)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferences     
    self._sweepIndirectReferences(externMap, realdata)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences     
    value = self._sweepIndirectReferences(externMap, value)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferences     
    self._sweepIndirectReferences(externMap, realdata)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences     
    value = self._sweepIndirectReferences(externMap, value)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 556, in _sweepIndirectReferences     
    value = self._sweepIndirectReferences(externMap, data[i])
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferences     
    self._sweepIndirectReferences(externMap, realdata)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences     
    value = self._sweepIndirectReferences(externMap, value)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences     
    value = self._sweepIndirectReferences(externMap, value)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences     
    value = self._sweepIndirectReferences(externMap, value)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 577, in _sweepIndirectReferences
    newobj = data.pdf.getObject(data)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\pdf.py", line 1611, in getObject
    retval = readObject(self.stream, self)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\generic.py", line 66, in readObject
    return DictionaryObject.readFromStream(stream, pdf)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\site-packages\PyPDF2\generic.py", line 604, in readFromStream
    assert "/Length" in data
AssertionError

在運行本教程中的每個示例時，我都參考了這篇博客文章教程 pypdf2我遇到了同樣的問題。

使用：Windows 10，Python 3.7.3，PyPDF2是最新版本

Answer 1

我不知道原因的細節（我對 PyPDF2 不再那么流利了），但我相信您必須為每個新頁面創建一個新的 PyPDF2 PdfFileReader 和 PdfFileWriter 。 您可以嘗試以下方法嗎？

from PyPDF2 import PdfFileReader, PdfFileWriter

input_pdf = "input.pdf"

# Get number of pages before looping
pages = PdfFileReader(input_pdf).getNumPages()  

for page in range(pages):
    pdf_reader = PdfFileReader(input_pdf)
    pdf_writer = PdfFileWriter()
    pdf_writer.addPage(pdf.getPage(page))

    output = f'output{page}.pdf'  # getting pdf name to be saved as
    with open(output, 'wb') as output_pdf:
        pdf_writer.write(output_pdf)