Added distinct query

src/cpl_query/_extension/iterable.py

@@ -7,6 +7,7 @@ from .._query.any_query import any_query
 from .._query.avg_query import avg_query
 from .._query.contains_query import contains_query
 from .._query.count_query import count_query
+from .._query.distinct_query import distinct_query
 from .._query.first_query import first_or_default_query, first_query
 from .._query.for_each_query import for_each_query
 from .._query.order_by import order_by_query, order_by_descending_query
@@ -35,6 +36,11 @@ class Iterable(IterableABC):
     def count(self, func: Callable = None) -> int:
         return count_query(self, func)
 
+    def distinct(self, func: Callable) -> IterableABC:
+        res = distinct_query(self, func)
+        res.__class__ = Iterable
+        return res
+
     def first(self) -> any:
         return first_query(self)