Merge image in Python

import aspose.slides as slides
import aspose.pydrawing as drawing

with slides.Presentation() as pres:
    slide = pres.slides[0]
    image1 = pres.images.add_image(drawing.Bitmap("image1.png"))
	slide.shapes.add_picture_frame(slides.ShapeType.RECTANGLE, 0, 0, 100, 100, image1)

    image2 = pres.images.add_image(drawing.Bitmap("image2.png"))
	slide.shapes.add_picture_frame(slides.ShapeType.RECTANGLE, 0, 200, 100, 100, image2)

    for sld in pres.slides:
        bmp = sld.get_thumbnail(1, 1)
        bmp.save("Slide_{num}.png".format(num=str(sld.slide_number)), drawing.imaging.ImageFormat.png)