Renamed files

src/cpl_query/_query/single.py

@@ -0,0 +1,28 @@
+from typing import Optional
+
+from cpl_query.exceptions import ArgumentNoneException, ExceptionArgument
+from cpl_query.extension.iterable_abc import IterableABC
+
+
+def single_query(_list: IterableABC) -> any:
+    if _list is None:
+        raise ArgumentNoneException(ExceptionArgument.list)
+
+    if len(_list) > 1:
+        raise Exception('Found more than one element')
+    elif len(_list) == 0:
+        raise Exception('Found no element')
+
+    return _list[0]
+
+
+def single_or_default_query(_list: IterableABC) -> Optional[any]:
+    if _list is None:
+        raise ArgumentNoneException(ExceptionArgument.list)
+
+    if len(_list) > 1:
+        raise Exception('Index out of range')
+    elif len(_list) == 0:
+        return None
+
+    return _list[0]