优化cannot import name 'OxmlElement' from 'docx.oxml'问题

[Syske]

由于python-docx更新，导致导包报错；

from docx.oxml import OxmlElement, parse_xml, register_element_cls

错误信息：

Traceback (most recent call last):
  File "D:\workspace\learning\python-script\pdf2wod.py", line 2, in <module>
    from pdf2docx import parse
  File "D:\workspace\dev-tools\python\python39\lib\site-packages\pdf2docx\__init__.py", line 1, in <module>
    from .converter import Converter
  File "D:\workspace\dev-tools\python\python39\lib\site-packages\pdf2docx\converter.py", line 9, in <module>
    from .page.Page import Page
  File "D:\workspace\dev-tools\python\python39\lib\site-packages\pdf2docx\page\Page.py", line 47, in <module>
    from ..layout.Sections import Sections
  File "D:\workspace\dev-tools\python\python39\lib\site-packages\pdf2docx\layout\Sections.py", line 9, in <module>
    from ..common.docx import reset_paragraph_format
  File "D:\workspace\dev-tools\python\python39\lib\site-packages\pdf2docx\common\docx.py", line 7, in <module>
    from docx.oxml import OxmlElement, parse_xml, register_element_cls
ImportError: cannot import name 'OxmlElement' from 'docx.oxml' (D:\workspace\dev-tools\python\python39\lib\site-packages\docx\oxml\__init__.py)

[dothinking]

感谢，这是 python-docx 从 v0.8.11 升级到 v1.0.0 出现的问题，随后作者在 v1.0.1中做了修复，python-docx#1256 。

建议用 try-except 同时考虑两种导入方式，以便兼容 1.0.0 和 其他版本。

try:
    # python-docx <= 0.8.11 or python-docx > 1.0.0
    from docx.oxml import OxmlElement, parse_xml, register_element_cls
except ImportError:
    # python-docx >= 1.0.0
    from docx.oxml.parser import OxmlElement, parse_xml, register_element_cls

[Syske]

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