使用源码报错

  File "/home/cbb/bin/caj2pdf-master/caj2pdf", line 5, in <module>     from cajparser import CAJParser   File "/home/cbb/bin/caj2pdf-master/cajparser.py", line 5, in <module>     from utils import fnd, fnd_all, add_outlines, fnd_rvrs, fnd_unuse_no   File "/home/cbb/bin/caj2pdf-master/utils.py", line 3, in <module>     import PyPDF2.generic as PDF   File "/home/cbb/bin/caj2pdf-master/PyPDF2/__init__.py", line 10, in <module>     from ._merger import PdfFileMerger, PdfMerger   File "/home/cbb/bin/caj2pdf-master/PyPDF2/_merger.py", line 31, in <module>     from ._encryption import Encryption   File "/home/cbb/bin/caj2pdf-master/PyPDF2/_encryption.py", line 34, in <module>     from PyPDF2.generic import (   File "/home/cbb/bin/caj2pdf-master/PyPDF2/generic.py", line 48, in <module>     from ._utils import (   File "/home/cbb/bin/caj2pdf-master/PyPDF2/_utils.py", line 50, in <module>     from typing_extensions import TypeAlias  # type: ignore[misc] ModuleNotFoundError: No module named 'typing_extensions' 

缺少 python 第三方包 typing_extensions

直接安装

pip install typing_extensions