can't export buildin function?

[RonaldinhoL]

>>> ctx.expose(print)
>>> ctx.eval('print')
<built-in function print>
>>> ctx.eval('print()')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
v8py.JSException: TypeError: print is not a function
>>> ctx.eval('typeof print')
'object'