How to get Metadata in python ONVIF?

Currently, I'm looking for metadata access functions using the in Python-onvif. I want to get the coordinates of "BoundingBox" inside the red box. How to i access data?

https://www.onvif.org/ver20/analytics/wsdl/analytics.wsdl#op.GetSupportedMetadata This function was used, but an AttributeError occurred.

from onvif import ONVIFCamera

cam = ONVIFCamera('192.168.100.133', 80, 'ID', 'P/W')
cam.create_analytics_service()

meta = cam.analytics.GetSupportedMetadata()
print(meta)

result:

Traceback (most recent call last):
  File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\zeep\proxy.py", line 97, in __getitem__
    return self._operations[key]
KeyError: 'GetSupportedMetadata'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\User\AppData\Roaming\JetBrains\PyCharmCE2021.2\scratches\meta_data.py", line 24, in <module>
    meta = cam.analytics.GetSupportedMetadata()
  File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\onvif\client.py", line 167, in __getattr__
    return self.service_wrapper(getattr(self.ws_client, name))
  File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\zeep\proxy.py", line 88, in __getattr__
    return self[key]
  File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\zeep\proxy.py", line 99, in __getitem__
    raise AttributeError("Service has no operation %r" % key)
AttributeError: Service has no operation 'GetSupportedMetadata'

I need your help.

I'm not exactly using the same onvif package you are, and I'm not so sure myself how to achieve this, but this is what I've got so far:

Both the package python-onvif, that you are using, and the Valkka inspired implementation I'm using, rely on a folder WSDL which contains pretty old versions of Onvif operations. It seems we both were using version 2.2 while the current version is 20.12.

So what I did was to download the newer versions at their repository and replace the contents of the WSDL folder with the content of the new WSDL folder. I also had to replace how the paths were built since now there is some folder hierarchy inplace to reach the WSDL files, but after that I was able to call GetSupportedMetadata successfully.