better understanding of isinstance in executions (temporary commit)

test/completion/isinstance.py

@@ -38,3 +38,12 @@ def fooooo(obj):
     if isinstance(obj, datetime.datetime):
         #? datetime.datetime
         obj
+
+def fooooo2(obj):
+    if isinstance(obj, datetime.datetime):
+        return obj
+    else:
+        return 1
+
+#? int() datetime.datetime
+fooooo2('')