update asserts

examples/widgets/img/lv_example_img_1.py

@@ -0,0 +1,29 @@
+from imagetools import get_png_info, open_png
+
+# Register PNG image decoder
+decoder = lv.img.decoder_create()
+decoder.info_cb = get_png_info
+decoder.open_cb = open_png
+
+# Create a screen with a draggable image
+
+with open('cogwheel.png','rb') as f:
+  png_data = f.read()
+
+png_img_dsc = lv.img_dsc_t({
+    'data_size': len(png_data),
+    'data': png_data 
+})
+
+scr = lv.scr_act()
+
+# Create an image on the left using the decoder
+
+# lv.img.cache_set_size(2)
+img1 = lv.img(scr)
+img1.align(scr, lv.ALIGN.CENTER, 0, -20)
+img1.set_src(png_img_dsc)
+
+img2 = lv.img(scr)
+img2.set_src(lv.SYMBOL.OK + "Accept")
+img2.align(img1, lv.ALIGN.OUT_BOTTOM_MID, 0, 20)