iterate repository architectures

repository.py

@@ -10,9 +10,12 @@ class Repository:
         self.architectures = [architecture.Architecture(self, a)
                               for a in arguments.architectures]
 
+    def __iter__(self):
+        return self.architectures.__iter__()
+
     def __str__(self):
         lines = [
             f'     Location: {self.location}',
-            f'Architectures: {[a.name for a in self.architectures]}',
+            f'Architectures: {[architecture.name for architecture in self]}',
         ]
         return os.linesep.join(lines)