diff -r bc1a178b3bc8 Lib/_collections_abc.py
--- a/Lib/_collections_abc.py	Sat Apr 18 05:54:02 2015 +0200
+++ b/Lib/_collections_abc.py	Mon Apr 20 21:33:43 2015 +0200
@@ -9,7 +9,7 @@
 from abc import ABCMeta, abstractmethod
 import sys
 
-__all__ = ["Hashable", "Iterable", "Iterator",
+__all__ = ["Hashable", "Iterable", "Iterator", "Generator",
            "Sized", "Container", "Callable",
            "Set", "MutableSet",
            "Mapping", "MutableMapping",
@@ -50,6 +50,7 @@
 dict_items = type({}.items())
 ## misc ##
 mappingproxy = type(type.__dict__)
+generator = type((lambda: (yield))())
 
 
 ### ONE-TRICK PONIES ###
@@ -124,6 +125,37 @@
 Iterator.register(tuple_iterator)
 Iterator.register(zip_iterator)
 
+
+class Generator(Iterator):
+
+    __slots__ = ()
+
+    def __next__(self):
+        """Return the next item from the generator.
+        When exhausted, raise StopIteration.
+        """
+        return self.send(None)
+
+    @abstractmethod
+    def send(self, value):
+        """Send a value into the generator.
+        Return next yielded value or raise StopIteration.
+        """
+        raise StopIteration
+
+    def throw(self, typ, val=None, rb=None):
+        """Raise an exception in the generator.
+        Return next yielded value or raise StopIteration.
+        """
+        raise StopIteration
+
+    def close(self):
+        """Raise GeneratorExit inside generator.
+        """
+
+Generator.register(generator)
+
+
 class Sized(metaclass=ABCMeta):
 
     __slots__ = ()