Use new YANG lib schema (no "submodules").

examples/test/yang-library-data.json

@@ -18,14 +18,12 @@
         "schema": "https://example.com/test.yang",
         "namespace": "http://example.com/test",
         "conformance-type": "implement",
-        "submodules": {
-          "submodule": [
-            {
-              "name": "subtest",
-              "revision": "2016-04-26"
-            }
-          ]
-        }
+        "submodule": [
+          {
+            "name": "subtest",
+            "revision": "2016-04-26"
+          }
+        ]
       },
       {
         "name": "defs",

yangson/context.py

@@ -63,8 +63,8 @@ class Context:
                 mod = cls._load_module(name, rev)
                 locpref = mod.find1("prefix", required=True).argument
                 cls.prefix_map[mid] = { locpref: mid }
-                if "submodules" in item and "submodule" in item["submodules"]:
-                    for s in item["submodules"]["submodule"]:
+                if "submodule" in item:
+                    for s in item["submodule"]:
                         sname = s["name"]
                         cls.ns_map[sname] = name
                         rev = s["revision"]