How to use the wand.compat.xrange function in Wand

if height is None:
            bottom = abs_(bottom, self.height)
            height = bottom - top
        if width < 1:
            raise ValueError('image width cannot be zero')
        elif height < 1:
            raise ValueError('image width cannot be zero')
        elif (left == top == 0 and width == self.width and
              height == self.height):
            return
        if self.animation:
            self.wand = library.MagickCoalesceImages(self.wand)
            library.MagickSetLastIterator(self.wand)
            n = library.MagickGetIteratorIndex(self.wand)
            library.MagickResetIterator(self.wand)
            for i in xrange(0, n + 1):
                library.MagickSetIteratorIndex(self.wand, i)
                library.MagickCropImage(self.wand, width, height, left, top)
                if reset_coords:
                    library.MagickResetImagePage(self.wand, None)
        else:
            library.MagickCropImage(self.wand, width, height, left, top)
            self.raise_exception()
            if reset_coords:
                self.reset_coords()

else:
            font_metrics_f = library.MagickQueryFontMetrics
        if isinstance(text, text_type):
            if self.text_encoding:
                text = text.encode(self.text_encoding)
            else:
                text = binary(text)
        result = font_metrics_f(image.wand, self.resource, text)
        if not result:  # pragma: no cover
            # Error on drawing context
            self.raise_exception()
            # Or error on image canvas
            image.raise_exception()
            # Generate a generic error if ImageMagick couldn't emit one.
            raise ValueError('Unable to render text with current font.')
        args = [result[i] for i in xrange(13)]
        library.MagickRelinquishMemory(result)
        return FontMetrics(*args)

def __iter__(self):
        if self.counts is None:
            pixels = self.pixels
            string = library.PixelGetColorAsString
            return (Color(string(pixels[i]).value)
                    for i in xrange(self.size.value))
        return iter(Color(string=c) for c in self.counts)

length = len(self)
        if slice_.start is None:
            start = 0
        elif slice_.start < 0:
            start = length + slice_.start
        else:
            start = slice_.start
        start = min(length, start)
        if slice_.stop is None:
            stop = 0
        elif slice_.stop < 0:
            stop = length + slice_.stop
        else:
            stop = slice_.stop
        stop = min(length, stop or length)
        return xrange(start, stop) if as_range else slice(start, stop, None)

repr(width))
        elif not isinstance(height, numbers.Integral):
            raise TypeError('height must be a natural number, not ' +
                            repr(height))
        elif width < 1:
            raise ValueError('width must be a natural number, not ' +
                             repr(width))
        elif height < 1:
            raise ValueError('height must be a natural number, not ' +
                             repr(height))
        if self.animation:
            self.wand = library.MagickCoalesceImages(self.wand)
            library.MagickSetLastIterator(self.wand)
            n = library.MagickGetIteratorIndex(self.wand)
            library.MagickResetIterator(self.wand)
            for i in xrange(n + 1):
                library.MagickSetIteratorIndex(self.wand, i)
                library.MagickSampleImage(self.wand, width, height)
            library.MagickSetSize(self.wand, width, height)
        else:
            r = library.MagickSampleImage(self.wand, width, height)
            library.MagickSetSize(self.wand, width, height)
            if not r:
                self.raise_exception()

def __getitem__(self, index):
        if isinstance(index, slice):
            slice_ = self.validate_slice(index)
            return [self[i] for i in xrange(slice_.start, slice_.stop)]
        index = self.validate_position(index)
        instances = self.instances
        instances_length = len(instances)
        if index < instances_length:
            instance = instances[index]
            if (instance is not None and
                    getattr(instance, 'c_resource', None) is not None):
                return instance
        else:
            number_to_extend = index - instances_length + 1
            instances.extend(None for _ in xrange(number_to_extend))
        wand = self.image.wand
        tmp_idx = library.MagickGetIteratorIndex(wand)
        library.MagickSetIteratorIndex(wand, index)
        image = library.GetImageFromMagickWand(wand)
        exc = libmagick.AcquireExceptionInfo()

def __next__(self, x=None):
        if self.cursor >= self.height:
            self.destroy()
            raise StopIteration()
        self.cursor += 1
        width = ctypes.c_size_t()
        pixels = library.PixelGetNextIteratorRow(self.resource,
                                                 ctypes.byref(width))
        get_color = library.PixelGetMagickColor
        struct_size = ctypes.sizeof(MagickPixelPacket)
        if x is None:
            r_pixels = [None] * width.value
            for x in xrange(width.value):
                pc = pixels[x]
                packet_buffer = ctypes.create_string_buffer(struct_size)
                get_color(pc, packet_buffer)
                r_pixels[x] = Color(raw=packet_buffer)
            return r_pixels
        packet_buffer = ctypes.create_string_buffer(struct_size)
        get_color(pixels[x], packet_buffer)
        return Color(raw=packet_buffer)

raise TypeError("resize must be a string, not " + repr(resize))
        # Also verify that only ASCII characters are included
        try:
            crop = crop.encode('ascii')
        except UnicodeEncodeError:
            raise ValueError('crop must only contain ascii-encodable ' +
                             'characters.')
        try:
            resize = resize.encode('ascii')
        except UnicodeEncodeError:
            raise ValueError('resize must only contain ascii-encodable ' +
                             'characters.')
        if self.animation:
            new_wand = library.MagickCoalesceImages(self.wand)
            length = len(self.sequence)
            for i in xrange(length):
                library.MagickSetIteratorIndex(new_wand, i)
                if i:
                    library.MagickAddImage(
                        new_wand,
                        library.MagickTransformImage(new_wand, crop, resize)
                    )
                else:
                    new_wand = library.MagickTransformImage(new_wand,
                                                            crop,
                                                            resize)
            self.sequence.instances = []
        else:
            new_wand = library.MagickTransformImage(self.wand, crop, resize)
        if not new_wand:
            self.raise_exception()
        self.wand = new_wand