add __iter__method to InstanceElement, because it's needed for arrays

jedi/evaluate_representation.py

@@ -220,6 +220,10 @@ class InstanceElement(use_metaclass(cache.CachedMetaClass, pr.Base)):
                 if not isinstance(command, unicode) else command
                 for command in self.var.get_commands()]
 
+    def __iter__(self):
+        for el in self.var.__iter__():
+            yield InstanceElement(self.instance, el, self.is_class_var)
+
     def __getattr__(self, name):
         return getattr(self.var, name)
 

jedi/parsing_representation.py

@@ -1260,9 +1260,11 @@ class Array(Call):
         This is not only used for calls on the actual object, but for
         ducktyping, to invoke this function with anything as `self`.
         """
-        if isinstance(instance, Array):
+        try:
             if instance.type in types:
                 return True
+        except AttributeError:
+            pass
         return False
 
     def __len__(self):

test/completion/arrays.py

@@ -154,9 +154,9 @@ def a(): return ''
 
 class C():
     def __init__(self):
-        self.a = (int(1)).real
+        self.a = (str()).upper()
 
-#? int()
+#? str()
 C().a
 
 # -----------------