code: def generateImgUrls(self, product_id, dynapi_key, format_id, slice_count):
      
      for x in range(slice_count):
        for y in range(slice_count):
          yield ("http://z2-ec2.images-amazon.com/R/1/a=" + product_id +
                 "+c=" + dynapi_key +
                 "+d=_SCR%28" + str(format_id) + "," + str(x) + "," + str(y) + "%29_=.jpg")
docs: Generate URLs for slice_count^2 subimages of a product.