topic Re: ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns in Tools

ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns'

shreyash — Thu, 23 Sep 2021 23:48:58 GMT

Hi I have a virtiual env with ydk 0.8.5.post2 installed

(rhel7-21.37.14) shreyash@arcee.cisco.com:~$ pip3 list | grep ydk
ydk                             0.8.5.post2 
ydk-models-cisco-ios-xr         7.5.1       
ydk-models-cisco-thinxr-install 6.5.1       
ydk-models-ietf                 0.1.5.post2 
ydk-models-openconfig           0.1.6.post1 
ydk-service-gnmi                0.4.0.post5

While executing one of my test script, I encounter a following error:

./../../cafykit/lib/topology/connection/ydkconnection.py:271: in read
    retval = self.crud.read(self.session, model)
/auto/cafy/release/21.37.14/rhel7-21.37.14/lib/python3.6/site-packages/ydk/services/crud_service.py:60: in read
    return _crud_read(provider, read_filter, False, self._crud.read)
/auto/cafy/release/21.37.14/rhel7-21.37.14/lib/python3.6/site-packages/ydk/services/crud_service.py:86: in _crud_read
    top_filters = _get_top_level_entity(filters, provider.get_session().get_root_schema())
/auto/cafy/release/21.37.14/rhel7-21.37.14/lib/python3.6/site-packages/ydk/entity_utils/entity_utils.py:230: in _get_top_level_entity
    return _datanode_to_entity(data_node)
/auto/cafy/release/21.37.14/rhel7-21.37.14/lib/python3.6/site-packages/ydk/entity_utils/entity_utils.py:79: in _datanode_to_entity
    yang_ns = importlib.import_module('ydk.models.{}._yang_ns'.format(name))
/usr/cisco/packages/python/python-3.6.7/lib/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
name = 'ydk.models._deviate._yang_ns', import_ = <function _gcd_import at 0x2b657e0beea0>
>   ???
E   ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns'
 
<frozen importlib._bootstrap>:953: ModuleNotFoundError
===================================================================================== 1 error in 29.22 seconds ======================================================================================
terminate called after throwing an instance of 'pybind11::error_already_set'
  what():  TypeError: '>=' not supported between instances of 'int' and 'NoneType'

Can someone please help me to understand if this package 'ydk.models._deviate._yang_ns' is expected to be there in 0.8.5

Re: ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns

shreyash — Fri, 24 Sep 2021 00:02:38 GMT

(rhel7-21.37.14) shreyash@arcee.cisco.com:~$ pip3 list | grep pybind11
pybind11                        2.4.3

Re: ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns

yangorelik — Fri, 24 Sep 2021 14:57:09 GMT

The package 'ydk.models._deviate' is not a part of YDK 0.8.5. It used to be generated in 0.5.5 for deviations. I guess, you generated bundle for IOS XR 7.5.1 yourself and erroneously included deviation files. I suggest you remove all deviation files from the bundle profile and regenerate the bundle.

Re: ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns

shreyash — Fri, 24 Sep 2021 16:52:06 GMT

Hi Yan,

Thank you so much for your prompt response.

Is there a document or wiki that I can follow on how to remove specific files from the bundle profile and regenerate the bundle?

Re: ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns

shreyash — Fri, 24 Sep 2021 17:00:33 GMT

Hi Yan,

Actually I think I know what the issue is. Thank you again for the pointer and the quick help.

Re: ModuleNotFoundError: No module named 'ydk.models._deviate._yang_ns

yangorelik — Fri, 24 Sep 2021 18:06:02 GMT

First, you can read the online documentation on how to build a profile and generate bundle. Second, you can follow ydk-gen profile for XR 6.6.3 as an example. Please keep in mind that for your specific test you might choose to include to the bundle only limited number of YANG models, which will significantly simply your work; just copy needed YANG files from repository to some temp directory and run 'pyang *' in that directory to make sure there no errors stating that some files are missing.