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我正在尝试运行通过自制软件安装的 ocrmypdf，但我的本地版本的 lxml（版本 4.2.4）存在问题：

Traceback (most recent call last):
  File "/usr/local/bin/ocrmypdf", line 5, in <module>
    from ocrmypdf.__main__ import run
  File "/usr/local/Cellar/ocrmypdf/9.8.2/libexec/lib/python3.8/site-packages/ocrmypdf/__init__.py", line 18, in <module>
    from . import helpers, hocrtransform, leptonica, pdfa, pdfinfo
  File "/usr/local/Cellar/ocrmypdf/9.8.2/libexec/lib/python3.8/site-packages/ocrmypdf/pdfa.py", line 38, in <module>
    import pikepdf
  File "/usr/local/Cellar/ocrmypdf/9.8.2/libexec/lib/python3.8/site-packages/pikepdf/__init__.py", line 54, in <module>
    from .models import (
  File "/usr/local/Cellar/ocrmypdf/9.8.2/libexec/lib/python3.8/site-packages/pikepdf/models/__init__.py", line 13, in <module>
    from .metadata import PdfMetadata
  File "/usr/local/Cellar/ocrmypdf/9.8.2/libexec/lib/python3.8/site-packages/pikepdf/models/metadata.py", line 17, in <module>
    from lxml import etree
ImportError: cannot import name 'etree' from 'lxml' ($HOME/anaconda3/lib/python3.7/site-packages/lxml/__init__.py)

如果我打开一个 python shell，我可以很好地导入：

>>> from lxml import etree
>>> etree.__file__
'$HOME/anaconda3/lib/python3.7/site-packages/lxml/etree.cpython-37m-darwin.so'

我的蟒蛇路径：

$HOME/anaconda3/lib/python3.7/site-packages:$HOME/Code_Repos/invoice2data//src:$HOME/Code_Repos/invoice2data//src/invoice2data:$HOME/anaconda3/lib/python3.7/site-packages:$HOME/Code_Repos/invoice2data

我不确定为什么自制软件包没有拾取模块文件，即使它说它指向同一个站点包文件夹。

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