Yet Another PYANG

An open source Python package that helps developers to translate YANG (RFC6020/RFC7950) data models to Python. YAPYANG mimics the functionality of YANG data structures, enforces types through annotations, and supports JSON/XML ser/des. YAPYANG is authored by Antonio Faria, governed as a benevolent dictatorship, and distributed under license

Quick Start

For convenience we've included a basic quick start below. Ensure that a supported version of Python and the latest version of YAPYANG is installed.

Start by choosing the YANG model to translate. We've simplified OpenConfig interfaces.

module openconfig-interfaces {
    namespace "http://openconfig.net/yang/interfaces";
    container interfaces {
        list interface {
            key "name";
            leaf name {
                type string;
            }
        }
    }
}

For each YANG node (module, container, list, and leaf) in the YANG model translate it into Python with YAPYANG through subclasses of the provided node types.

from yapyang import *

class Name(LeafNode):
    __identifier__ = "name"

    value: str

class Interface(ListNode):
    __identifier__ = "interface"
    __key__ = "name"

    name: Name

class Interfaces(ContainerNode):
    __identifier__ = "interfaces"

    interface: Interface

class OpenConfigInterfaces(ModuleNode):
    __identifier__ = "openconfig-interfaces"
    __namespace__ = "http://openconfig.net/yang/interfaces"

    interfaces: Interfaces

Create instances of the translated YANG model nodes, add interface entries, and serialize to XML. Read the full docs.

module = OpenConfigInterfaces(Interfaces(Interface()))
module.interfaces.interface.append(Name("xe-0/0/0"))
print(module.to_xml())
...

<interfaces xmlns="http://openconfig.net/yang/interfaces"><interface><name>xe-0/0/0</name></interface></interfaces>

Versioning

Releases will follow semantic versioning (major.minor.patch). Before 1.0.0 breaking changes can be included in a minor release, therefore we highly recommend pinning this package.

Contributing

Suggest a feature or report a bug. Read our developer guide.

License

YAPYANG is distributed under the Apache 2.0 license.