update from atlas

metaprog/plainpoint.py

@@ -0,0 +1,25 @@
+"""
+A class equivalent to the class statement below would be generated by this code:
+
+    >>> import collections
+    >>> Point = collections.plainclass('Point', 'x y')
+"""
+
+class Point(object):
+    __slots__ = ['x', 'y']  # save memory in the likely event there are many instances
+
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+    def __repr__(self):
+        return 'Point({!r}, {!r})'.format(self.x, self.y)
+
+    def __eq__(self, other):
+        if not isinstance(other, Point):
+            return NotImplemented
+        return self.x == other.x and self.y == other.y
+
+    def __iter__(self, other):  # support unpacking
+        yield self.x
+        yield self.y