schema: check parsed object before use by jeremie6wind · Pull Request #167 · CESNET/libyang-python

With libyang/sysrepo 4 and printed contexts, the parsed object can be null.
Check the parsed object before using it.
If the parsed object is missing:

• Module methods won't yield anything.
• ExtensionParsed _module_from_parsed raises an exception.
• SNode if_features won't yield anything.
• Create a Type object without the parsed type.
• The Container presence returns None.
• For list and leaflist order, return the info from the compiled object.

Fixes: 0a4b09f ("cffi: allows to usage of libyang v4")