def unicode_expandtabs__RopeUnicode_ANY(space, w_self, w_tabsize):
    from pypy.objspace.std.ropeobject import _tabindent
    self = w_self._node
    tabsize  = space.int_w(w_tabsize)
    splitted = rope.split(self, rope.LiteralStringNode.PREBUILT[ord('\t')])
    last = splitted[0]
    expanded = [last]
    for i in range(1, len(splitted)):
        expanded.append(rope.multiply(rope.LiteralStringNode.PREBUILT[ord(" ")],
                                      _tabindent(last, tabsize)))
        last = splitted[i]
        expanded.append(last)
    return W_RopeUnicodeObject(rope.rebalance(expanded))

def unicode_expandtabs__RopeUnicode_ANY(space, w_self, w_tabsize):
    from pypy.objspace.std.ropeobject import _tabindent

    self = w_self._node
    tabsize = space.int_w(w_tabsize)
    splitted = rope.split(self, rope.LiteralStringNode.PREBUILT[ord("\t")])
    last = splitted[0]
    expanded = [last]
    for i in range(1, len(splitted)):
        expanded.append(rope.multiply(rope.LiteralStringNode.PREBUILT[ord(" ")], _tabindent(last, tabsize)))
        last = splitted[i]
        expanded.append(last)
    try:
        return W_RopeUnicodeObject(rope.rebalance(expanded))
    except OverflowError:
        raise OperationError(space.w_OverflowError, space.wrap("string too long"))

def str_expandtabs__Rope_ANY(space, w_self, w_tabsize):   
    node = w_self._node
    length = node.length()
    if length == 0:
        return W_RopeObject.EMPTY
    tabsize  = space.int_w(w_tabsize)
    
    splitted = rope.split(node, rope.LiteralStringNode.PREBUILT[ord("\t")])
    last = splitted[0]
    expanded = [last]
    for i in range(1, len(splitted)):
        expanded.append(rope.multiply(rope.LiteralStringNode.PREBUILT[ord(" ")],
                                      _tabindent(last, tabsize)))
        last = splitted[i]
        expanded.append(last)
    return W_RopeObject(rope.rebalance(expanded))

    if sl == 0:
        return W_RopeObject.EMPTY
    return W_RopeObject(rope.getslice(node, start, stop, 1, sl))

def mul_string_times(space, w_str, w_times):
    try:
        mul = space.getindex_w(w_times, space.w_OverflowError)
    except OperationError, e:
        if e.match(space, space.w_TypeError):
            raise FailedToImplement
        raise
    if mul <= 0:
        return W_RopeObject.EMPTY
    node = w_str._node
    try:
        return W_RopeObject(rope.multiply(node, mul))
    except OverflowError:
        raise OperationError(space.w_OverflowError,
                             space.wrap("string too long"))

def mul__Rope_ANY(space, w_str, w_times):
    return mul_string_times(space, w_str, w_times)

def mul__ANY_Rope(space, w_times, w_str):
    return mul_string_times(space, w_str, w_times)

def add__Rope_Rope(space, w_left, w_right):
    right = w_right._node
    left = w_left._node
    try:
        return W_RopeObject(rope.concatenate(left, right))