NumberingPart.new NotImplementedError

[KaHuier]

the simple code

from docx import Document

doc = Document(r"xxxx.docx")
print(doc.part.numbering_part)

The following issues have occurred

Traceback (most recent call last):
  File "x.py", line 4, in <module>
    print(doc.part.numbering_part)
  File "\mars-win-amd64-python3.9\lib\site-packages\docx\shared.py", line 242, in __get__
    value = self._fget(obj)
  File "\mars-win-amd64-python3.9\lib\site-packages\docx\parts\document.py", line 99, in numbering_part
    numbering_part = NumberingPart.new()
  File "\mars-win-amd64-python3.9\lib\site-packages\docx\parts\numbering.py", line 15, in new
    raise NotImplementedError
NotImplementedError

After investigation, it was found that the 'NumberingPart. new()' used in the 'numbing_part' did not implement the function.

The following is the code used by 'NumberingPart.new()'

class NumberingPart(XmlPart):
    """Proxy for the numbering.xml part containing numbering definitions for a document
    or glossary."""

    @classmethod
    def new(cls):
        """Return newly created empty numbering part, containing only the root
        ``<w:numbering>`` element."""
        raise NotImplementedError

[roydad]

I have the same problem.