Unpacking a class that contains __iter__ into the __future__ print function fails

[Matthew94]

I have a class that overrides __iter__ to allow me to unpack it like a tuple. It works just fine on CPython 2.7.8 but fails on IronPython 2.7.5.

As seen below the Error is:

TypeError: print() argument after * must be a sequence, not Object_1$1

The console output below is me trying it on CPython then Ironpython.

Python 2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import register
>>> a = register.Register(0,0,0)
>>> from __future__ import print_function
>>> print(*a)
0 0 0

IronPython 2.7.5 (2.7.5.0) on .NET 4.0.30319.18408 (32-bit)
Type "help", "copyright", "credits" or "license" for more information.
>>> import register
>>> from __future__ import print_function
>>> a = register.Register(0,0,0)
>>> print(*a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: print() argument after * must be a sequence, not Object_1$1

If I call __iter__ manually then it works.

>>> print(*a.__iter__())
0 0 0

You can try it out with the following code (copied from IDLE).

>>> class me(object):
    def __init__(self):
        self.a=1
        self.b=2
        self.c=3
    def __iter__(self):
        for value in (self.a, self.b, self.c):
            yield value


>>> a = me()
>>> print(*a)
1 2 3

It will fail through IronPython.

EDIT: Seems to only be an issue with the print function. I can unpack into function other than print.