PYPDF2给出“ TypeError：参数应该是整数或无，而不是NullObject;

Question

使用此脚本，我将创建一个结合了许多PDF的单个PDF文件 我在这条代码input_folder_pdf = sys.argv [1]的代码中给它的文件夹，如果不存在，它将创建输出文件夹。 这个代码有效，

import PyPDF2
import sys
import os
input_folder_pdf = sys.argv[1]
output_folder_file = sys.argv[2]
if not os.path.exists(output_folder_file):
    os.makedirs(output_folder_file)
    print(output_folder_file, 'folder crated!')
input_name = input('name the combined pdf : ')
pdf_inputs = []
for filename in os.listdir(input_folder_pdf):
    name = f'{input_folder_pdf}{filename}'
    pdf_inputs.append(name)
merger = PyPDF2.PdfFileMerger(strict=False)
for pdf in pdf_inputs:
    merger.append(pdf)
    print(pdf, ' added!!')
combined_name = str(output_folder_file) + str(input_name) + '.pdf'
merger.write(combined_name)
print('Done!')

我在porwershell中运行了这样的代码： python3.9.exe {this_script.py} {。\ the_path_folder_of_the_pdfs \} {。\ the_output_folder \}> 将文件夹名称带有空格会导致sys.argv 索引对我来说。

这里的文件链接在此代码中效果很好：

“引起此问题的文件：

C:\Users\user\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\PyPDF2\_reader.py:993: PdfReadWarning: Invalid stream (index 35) within object 96 0: Stream has ended unexpectedly
  warnings.warn(
Traceback (most recent call last):
  File "F:\download telegram desktop\Manga\jujustu_kaisen\Pdf_combiner.py", line 22, in <module>
    merger.write(final_name)
  File"C:\Users\user\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\PyPDF2\generic.py", line 800, in read_from_stream
    data["__streamdata__"] = stream.read(length)
TypeError: argument should be integer or None, not 'NullObject'

Answer 1

从PYPDF2移至PYPDF。我是两个项目的维护者，我不再更新PYPDF2。

该错误仍然存​​在于pypdf == 3.2.0中，但不再在pypdf == 3.4.1中。 升级您的pypdf版本。

如何提出好问题

作为旁注，表明该问题的代码的问题部分可能会降低到：

from pypdf import PdfMerger

merger = PdfMerger(strict=False)
merger.append("problematic-doc.pdf")
merger.write("out-combined.pdf")

带有Python 3.11的追溯将看起来像这样：

Traceback (most recent call last):
  File "/home/moose/so-pypdf/foo.py", line 4, in <module>
    merger.append("problematic-doc.pdf")
  File "/home/moose/.pyenv/versions/3.11.1/lib/python3.11/site-packages/pypdf/_utils.py", line 441, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/moose/.pyenv/versions/3.11.1/lib/python3.11/site-packages/pypdf/_merger.py", line 317, in append
    self.merge(len(self.pages), fileobj, outline_item, pages, import_outline)
  File "/home/moose/.pyenv/versions/3.11.1/lib/python3.11/site-packages/pypdf/_utils.py", line 441, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/moose/.pyenv/versions/3.11.1/lib/python3.11/site-packages/pypdf/_merger.py", line 194, in merge
    stream, encryption_obj = self._create_stream(fileobj)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/moose/.pyenv/versions/3.11.1/lib/python3.11/site-packages/pypdf/_merger.py", line 263, in _create_stream
    stream = FileIO(fileobj, "rb")
             ^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'problematic-doc.pdf'