1 files changed, 31 insertions, 0 deletions
diff --git a/pypers/oxford/namedtuple.py b/pypers/oxford/namedtuple.py
new file mode 100755
index 0000000..aea1049
--- /dev/null
+++ b/pypers/oxford/namedtuple.py
@@ -0,0 +1,31 @@
+# use operator.itemgetter if we're in 2.4, roll our own if we're in 2.3
+try:
+     from operator import itemgetter
+except ImportError:
+     def itemgetter(i):
+         def getter(self): return self[i]
+         return getter
+def superTuple(typename, *attribute_names):
+     " create and return a subclass of `tuple', with named attributes "
+     # make the subclass with appropriate __new__ and __repr__ specials
+     nargs = len(attribute_names)
+     class supertup(tuple):
+         __slots__ = ()         # save memory, we don't need per-instance dict
+         def __new__(cls, *args):
+             if len(args) != nargs:
+                 raise TypeError, \
+                       '%s takes exactly %d arguments (%d given)' % (
+                     typename, nargs, len(args))
+             return tuple.__new__(cls, args)
+         def __repr__(self):
+             return '%s(%s)' % (typename, ', '.join(map(repr, self)))
+     # add a few key touches to our new subclass of `tuple'
+     for index, attr_name in enumerate(attribute_names):
+         setattr(supertup, attr_name, property(itemgetter(index)))
+     supertup.__name__ = typename
+     return supertup
+
+Point = superTuple('Point', 'x', 'y')
+p = Point(1,2)
+print p
+print p.x,p.y