Add support to pyangbind for "action" statement

[nickweeds]

If the Yang module contains a Yang 1.1 action statement then pyang bind fails with a TypeError.

For example, running pyang bind on the ietf-routing.yang module in RFC 8349 fails as follows:

$ pyang --plugindir $PYBINDPLUGIN -f pybind -o ietf-routing.py ietf-routing.yang
Traceback (most recent call last):
  File "/usr/bin/pyang", line 444, in <module>
    run()
  File "/usr/bin/pyang", line 413, in run
    emit_obj.emit(ctx, modules, fd)
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 203, in emit
    build_pybind(ctx, modules, fd)
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 419, in build_pybind
    get_children(ctx, fd, children, m, m)
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 760, in get_children
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 1456, in get_element
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 760, in get_children
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 1456, in get_element
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 760, in get_children
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 1456, in get_element
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 760, in get_children
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 1456, in get_element
    register_paths=register_paths,
  File "/data/npw/tmp/pyangbind/pyangbind/plugin/pybind.py", line 820, in get_children
    raise TypeError("unhandled keyword with children %s at %s" % (parent.keyword, parent.pos))
TypeError: unhandled keyword with children action at ietf-routing.yang:469

[This output is from running pyangbind master commit bcb1d86]

It would be preferable to ignore action statements and generate the rest of the Python code, or to support action statements in a similar fashion to RPCs.

[marcokloeckler]

I also experienced that problem and did a quick and dirty fix. See here.
You just need to add action to a specific list. (here is the required addition)

I know this is a dirty fix, but the generation works and the actions are ignored (empty classes are created).

[JoseIgnacioTamayo]

Updated the Title of the issue.