Fix containers and out of order tables dict behavior

.travis.yml

@@ -25,7 +25,6 @@ after_success:
 jobs:
   include:
     - python: "2.7"
-    - python: "3.4"
     - python: "3.5"
     - python: "3.6"
     - python: "3.7"

tests/test_toml_document.py

@@ -551,5 +551,21 @@ def test_out_of_order_tables_are_still_dicts():
     assert isinstance(doc["a"], dict)
     assert isinstance(doc["a"]["a"], dict)
 
-    assert "key" in doc["a"]["a"]
-    assert "c" in doc["a"]["a"]
+    table = doc["a"]["a"]
+    assert "key" in table
+    assert "c" in table
+    assert "value" == table.get("key")
+    assert {} == table.get("c")
+    assert table.get("d") is None
+    assert "foo" == table.get("d", "foo")
+
+    assert "bar" == table.setdefault("d", "bar")
+    assert "bar" == table["d"]
+
+    assert "value" == table.pop("key")
+    assert "key" not in table
+
+    assert "baz" == table.pop("missing", default="baz")
+
+    with pytest.raises(KeyError):
+        table.pop("missing")

tomlkit/container.py

@@ -23,6 +23,9 @@
 from .items import item as _item
 
 
+_NOT_SET = object()
+
+
 class Container(dict):
     """
     A container for items within a TOMLDocument.
@@ -501,6 +504,19 @@ def get(self, key, default=None):  # type: (Any, Optional[Any]) -> Any
 
         return self[key]
 
+    def pop(self, key, default=_NOT_SET):
+        try:
+            value = self[key]
+        except KeyError:
+            if default is _NOT_SET:
+                raise
+
+            return default
+
+        del self[key]
+
+        return value
+
     def setdefault(
         self, key, default=None
     ):  # type: (Union[Key, str], Any) -> Union[Item, Container]
@@ -698,6 +714,23 @@ def keys(self):
     def values(self):
         return self._internal_container.values()
 
+    def items(self):  # type: () -> Generator[Item]
+        return self._internal_container.items()
+
+    def update(self, other):  # type: (Dict) -> None
+        self._internal_container.update(other)
+
+    def get(self, key, default=None):  # type: (Any, Optional[Any]) -> Any
+        return self._internal_container.get(key, default=default)
+
+    def pop(self, key, default=_NOT_SET):
+        return self._internal_container.pop(key, default=default)
+
+    def setdefault(
+        self, key, default=None
+    ):  # type: (Union[Key, str], Any) -> Union[Item, Container]
+        return self._internal_container.setdefault(key, default=default)
+
     def __contains__(self, key):
         return key in self._internal_container