Add to_dict method to ResourceField

This allows to recursively convert ResourceFields to dicts.

Signed-off-by: Felix Matouschek <fmatouschek@redhat.com>

kubernetes/base/dynamic/resource.py

@@ -389,3 +389,15 @@ class ResourceField(object):
     def __iter__(self):
         for k, v in self.__dict__.items():
             yield (k, v)
+
+    def to_dict(self):
+        return self.__serialize(self)
+
+    def __serialize(self, field):
+        if isinstance(field, ResourceField):
+            return {
+                k: self.__serialize(v) for k, v in field.__dict__.items()
+            }
+        if isinstance(field, (list, tuple)):
+            return [self.__serialize(item) for item in field]
+        return field

kubernetes/base/dynamic/test_client.py

@@ -563,5 +563,4 @@ class TestDynamicClientSerialization(unittest.TestCase):
         res = ResourceField(params=params)
         self.assertEqual(res["foo"], params["foo"])
         self.assertEqual(res["self"], params["self"])
-        # method will return original object when it doesn't know how to proceed
-        self.assertEqual(self.client.serialize_body(res), res)
+        self.assertEqual(self.client.serialize_body(res), params)