Added element at query

src/cpl_query/_query/element_at.py

@@ -0,0 +1,25 @@
+from cpl_query.exceptions import ArgumentNoneException, ExceptionArgument
+from cpl_query.extension.iterable_abc import IterableABC
+
+
+def element_at_query(_list: IterableABC, _index: int) -> any:
+    if _list is None:
+        raise ArgumentNoneException(ExceptionArgument.list)
+
+    if _index is None:
+        raise ArgumentNoneException(ExceptionArgument.index)
+
+    return _list[_index]
+
+
+def element_at_or_default_query(_list: IterableABC, _index: int) -> any:
+    if _list is None:
+        raise ArgumentNoneException(ExceptionArgument.list)
+
+    if _index is None:
+        raise ArgumentNoneException(ExceptionArgument.index)
+
+    try:
+        return _list[_index]
+    except IndexError:
+        return None