ERROR - Data is invalid according to the yang model.

[datavailops]

Hi there,

I'm using the YDK docker image, so I'm assuming that the software versions are correct, but regardless of the code that I write I get the following bunch of errors:

2020-06-02 15:05:58,515 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Invalid keyword "[1-9][0-9]{1,2}|[1-9])\.\.(409[0-4]|"".
2020-06-02 15:05:58,516 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan-types" parsing failed.
2020-06-02 15:05:58,517 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan-types" module into "openconfig-vlan" failed.
2020-06-02 15:05:58,518 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan" parsing failed.
2020-06-02 15:05:58,519 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan" module into "cisco-xe-openconfig-interfaces-deviation" failed.
2020-06-02 15:05:58,520 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "cisco-xe-openconfig-interfaces-deviation" parsing failed.
2020-06-02 15:05:58,527 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Invalid keyword "[1-9][0-9]{1,2}|[1-9])\.\.(409[0-4]|"".
2020-06-02 15:05:58,528 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan-types" parsing failed.
2020-06-02 15:05:58,529 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan-types" module into "openconfig-vlan" failed.
2020-06-02 15:05:58,529 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan" parsing failed.
2020-06-02 15:05:58,530 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan" module into "openconfig-if-ip" failed.
2020-06-02 15:05:58,530 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-if-ip" parsing failed.
2020-06-02 15:05:58,533 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Invalid keyword "[1-9][0-9]{1,2}|[1-9])\.\.(409[0-4]|"".
2020-06-02 15:05:58,533 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan-types" parsing failed.
2020-06-02 15:05:58,534 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan-types" module into "openconfig-vlan" failed.
2020-06-02 15:05:58,535 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan" parsing failed.
2020-06-02 15:05:58,536 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan" module into "openconfig-if-ip" failed.
2020-06-02 15:05:58,536 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-if-ip" parsing failed.
2020-06-02 15:05:58,536 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-if-ip" module into "cisco-xe-openconfig-if-ip-deviation" failed.
2020-06-02 15:05:58,537 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "cisco-xe-openconfig-if-ip-deviation" parsing failed.
2020-06-02 15:05:58,538 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Invalid keyword "[1-9][0-9]{1,2}|[1-9])\.\.(409[0-4]|"".
2020-06-02 15:05:58,539 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan-types" parsing failed.
2020-06-02 15:05:58,540 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan-types" module into "openconfig-vlan" failed.
2020-06-02 15:05:58,540 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "openconfig-vlan" parsing failed.
2020-06-02 15:05:58,541 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Importing "openconfig-vlan" module into "cisco-xe-openconfig-interfaces-deviation" failed.
2020-06-02 15:05:58,541 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "cisco-xe-openconfig-interfaces-deviation" parsing failed.

The code I'm using as a test case is really simple:

from ydk.models.openconfig import openconfig_interfaces as oc_if
from ydk.models.cisco_ios_xe import Cisco_IOS_XE_interfaces_oper as xe_if
from ydk.services import CRUDService
from ydk.providers import NetconfServiceProvider

provider = NetconfServiceProvider(address="192.168.121.231",port=830,username="root",password="foobar")

crud = CRUDService()
oc_ints = crud.read(provider, oc_if.Interfaces())
xe_ints = crud.read(provider, xe_if.Interfaces())

It doesn't really matter what I do after that, it seems to fail to populate the binding regardless, and if I look at the verbose logging output I see the errors listed above, but I also see the netconf data coming back from the device. So, it's definitely getting the right data from the device, it's just not able to populate the binding.

I've tried against XE versions 16.12.3, 16.9.3, and 16.8.1.

Does anybody have any feedback for me? My code could definitely be faulty too, but just looking for another set of eyes.

[yangorelik · Accepted solution]

This issue and solution were discussed in this post. In short, you need reinstall libydk and python core package.

[datavailops]

Thanks for the feedback. I did see that post, but I'm using the docker image, so I figured it was using the updated version already, and I checked the installed version, which appears to be 0.8.4:

root@1b823eb0ee13:~# pip freeze | grep ydk
ydk==0.8.4
ydk-models-cisco-ios-xe==16.9.3
ydk-models-cisco-ios-xr==6.6.2
ydk-models-cisco-nx-os==9.2.3
ydk-models-ietf==0.1.5.post2
ydk-models-openconfig==0.1.8
ydk-service-gnmi==0.4.0.post1
root@1b823eb0ee13:~#

In any case, I did try going through the instructions in that post, but the ./generate step fails on a number of module imports. I tried pip installing them, but it appears that pip defaults to pip3, but python defaults to 2.7, so they weren't showing up. I ran the generate.py script with python3 after installing the missing modules which worked. Finally, I realized that my python script was also using 2.7, so after running that with 3 it works now.

Thank you!