Add types to the append() methods of the Table and InlineTable …

…classes (#282)

* Add types to the append() methods of the Table and InlineTable classes

* Add None to key type and fix SIM910 errorswar

tomlkit/container.py

@@ -477,7 +477,7 @@ def item(self, key: Union[Key, str]) -> Item:
         if not isinstance(key, Key):
             key = SingleKey(key)
 
-        idx = self._map.get(key, None)
+        idx = self._map.get(key)
         if idx is None:
             raise NonExistentKey(key)
 
@@ -645,7 +645,7 @@ def __getitem__(self, key: Union[Key, str]) -> Union[Item, "Container"]:
         if not isinstance(key, Key):
             key = SingleKey(key)
 
-        idx = self._map.get(key, None)
+        idx = self._map.get(key)
         if idx is None:
             raise NonExistentKey(key)
 
@@ -681,7 +681,7 @@ def _replace(
         if not isinstance(key, Key):
             key = SingleKey(key)
 
-        idx = self._map.get(key, None)
+        idx = self._map.get(key)
         if idx is None:
             raise NonExistentKey(key)
 

tomlkit/items.py

@@ -1574,7 +1574,7 @@ def __copy__(self) -> "Table":
             self.display_name,
         )
 
-    def append(self, key, _item):
+    def append(self, key: Union[Key, str, None], _item: Any) -> "Table":
         """
         Appends a (key, item) to the table.
         """
@@ -1605,7 +1605,7 @@ def append(self, key, _item):
 
         return self
 
-    def raw_append(self, key: Union[Key, str], _item: Any) -> "Table":
+    def raw_append(self, key: Union[Key, str, None], _item: Any) -> "Table":
         """Similar to :meth:`append` but does not copy indentation."""
         if not isinstance(_item, Item):
             _item = item(_item)
@@ -1691,7 +1691,7 @@ def __init__(
     def discriminant(self) -> int:
         return 10
 
-    def append(self, key, _item):
+    def append(self, key: Union[Key, str, None], _item: Any) -> "InlineTable":
         """
         Appends a (key, item) to the table.
         """