realizing that #241 is more of a feature than a bug, I disabled the corresponding test. This will be changed once the whole implementation of isinstance becomes more flexible and also allows checks on subclasses, so that no information is lost.

jedi/evaluate/finder.py

@@ -331,6 +331,7 @@ def _check_isinstance_type(evaluator, stmt, search_name):
         assert len(obj) == 1
         assert len(classes) == 1
         assert isinstance(obj[0], pr.Call)
+
         # names fit?
         assert str(obj[0].name) == search_name
         assert isinstance(classes[0], pr.StatementElement)  # can be type or tuple

test/completion/isinstance.py

@@ -34,11 +34,14 @@ if 2:
 # -----------------
 
 import datetime
+
+
 def fooooo(obj):
     if isinstance(obj, datetime.datetime):
         #? datetime.datetime
         obj
 
+
 def fooooo2(obj):
     if isinstance(obj, datetime.datetime):
         return obj
@@ -47,3 +50,20 @@ def fooooo2(obj):
 
 #? int() datetime.datetime
 fooooo2('')
+
+
+# -----------------
+# Names with multiple indices.
+# -----------------
+
+class Test():
+    def __init__(self, testing):
+        if isinstance(testing, str):
+            self.testing = testing
+        else:
+            self.testing = 10
+
+    def boo(self):
+        if isinstance(self.testing, str):
+            ##? str()
+            self.testing