Implement iter() builtin

python/common/org/Python.java

@@ -224,7 +224,6 @@ public static void initializeModule(java.lang.Class cls, java.util.Map<java.lang
     public static java.lang.String typeName(java.lang.Class cls) {
         org.python.types.Type klass = org.python.types.Type.pythonType(cls);
         java.lang.String name = null;
-
         // First look to the Type for an instance variable holding a
         // cached version of the type name.
         if (klass.PYTHON_TYPE_NAME == null) {
@@ -339,7 +338,7 @@ public static java.util.Map<java.lang.String, org.python.Object> addToKwargs(jav
                     "The globals argument is only used to determine the context;\n" +
                     "they are not modified.  The locals argument is unused.  The fromlist\n" +
                     "should be a list of names to emulate ``from name import ...'', or an\n" +
-                    "empty list to emulate ``import name''.\n" +
+                    "eto install a suitable language package and/or debugger package since atom-ide-ui doesn't provide any language or debugger support by default.mpty list to emulate ``import name''.\n" +
                     "When importing a module from a package, note that __import__('A.B', ...)\n" +
                     "returns package A when fromlist is empty, but its submodule B when\n" +
                     "fromlist is not empty.  Level is used to determine whether to perform\n" +
@@ -949,7 +948,21 @@ public static org.python.Object iter(org.python.Object iterable, org.python.Obje
                 throw new org.python.exceptions.TypeError("'" + iterable.typeName() + "' object is not iterable");
             }
         } else {
-            throw new org.python.exceptions.NotImplementedError("Builtin function 'iter' with callable/sentinel not implemented");
+            // in the case that a sentinel value is provided
+            java.util.List iterList = new java.util.ArrayList();
+            try {
+                try {
+                    while (iterable != sentinel) {
+                        iterList.add(iterable.__next__());
+                    }
+                } catch (org.python.exceptions.StopIteration e) {
+                    throw new org.python.exceptions.StopIteration();
+                }
+            } catch (org.python.exceptions.AttributeError e) {
+                // No __iter__ == not iterable
+                throw new org.python.exceptions.TypeError("'" + iterable.typeName() + "' object is not iterable");
+            }
+            return iter(new org.python.types.List(iterList));
         }
     }