fix issue #213 : CommentedMap.copy() incomplete result

Only the "native" keys were copied, not any of the merged keys.
Now .copy() is implemented and a "flattened" new dict is returned.

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1 files changed, 7 insertions, 0 deletions

diff --git a/comments.py b/comments.py
index 84fecbc..88ccea3 100644
--- a/comments.py
+++ b/comments.py
@@ -912,6 +912,13 @@ class CommentedMap(ordereddict, CommentedBase):
             setattr(self, merge_attrib, [])
         return getattr(self, merge_attrib)
 
+    def copy(self):
+        x = {}  # update doesn't work
+        for k, v in self._items():
+            print(k, v)
+            x[k] = v
+        return x
+
     def add_yaml_merge(self, value):
         # type: (Any) -> None
         self.merge.extend(value)