+class iterproxy(object):
+ # Makes sure iter(real).next() is called immediately, in order to
+ # let generator code run.
+ def __init__(self, real):
+ self.bk = real
+ self.bki = iter(real)
+ self._next = [None]
+ self.next()
+
+ def __iter__(self):
+ return self
+
+ def next(self):
+ if self._next is None:
+ raise StopIteration()
+ ret = self._next[0]
+ try:
+ self._next[:] = [self.bki.next()]
+ except StopIteration:
+ self._next = None
+ return ret
+
+ def close(self):
+ if hasattr(self.bk, "close"):
+ self.bk.close()
+