lunt

Author: ladyada

examples/miniqr_displaytest.py

@@ -11,38 +11,39 @@
 
 def draw_QR(matrix):
     # how big each pixel is, add 2 blocks on either side
-    BLOCK_SIZE = DISPLAY_W // (qr.matrix.width+4)  
-    
+    BLOCK_SIZE = DISPLAY_W // (matrix.width+4)
+
     # Center the QR code in the middle of the screen
-    X_OFFSET = (DISPLAY_W - BLOCK_SIZE * qr.matrix.width) // 2
-    Y_OFFSET = (DISPLAY_H - BLOCK_SIZE * qr.matrix.height) // 2
-    
+    X_OFFSET = (DISPLAY_W - BLOCK_SIZE * matrix.width) // 2
+    Y_OFFSET = (DISPLAY_H - BLOCK_SIZE * matrix.height) // 2
+
     # monochome (2 color) palette
     palette = displayio.Palette(2)
     palette[0] = 0xFFFFFF
     palette[1] = 0x000000
-    
+
     # bitmap the size of the screen, monochrome (2 colors)
     bitmap = displayio.Bitmap(DISPLAY_H, DISPLAY_W, 2)
-    
+
     # raster the QR code
     line = bytearray(DISPLAY_W // 8)  # monochrome means 8 pixels per byte
-    for y in range(qr.matrix.height):    # each scanline in the height
-        for i in range(len(line)):    # initialize it to be empty
+    for y in range(matrix.height):    # each scanline in the height
+        for i, _ in enumerate(line):    # initialize it to be empty
             line[i] = 0
-        for x in range(qr.matrix.width):
-            if qr.matrix[x, y]:
+        for x in range(matrix.width):
+            if matrix[x, y]:
                 for b in range(BLOCK_SIZE):
                     _x = X_OFFSET + x * BLOCK_SIZE + b
                     line[_x // 8] |= 1 << (7-(_x % 8))
-                
+
         for b in range(BLOCK_SIZE):
             # load this line of data in, as many time as block size
+            #pylint: disable=protected-access
             bitmap._load_row(Y_OFFSET + y*BLOCK_SIZE+b, line)
 
     # display the bitmap using our palette
     splash = displayio.Group()
-    face = displayio.Sprite(bitmap, pixel_shader=palette, position=(0,0))
+    face = displayio.Sprite(bitmap, pixel_shader=palette, position=(0, 0))
     splash.append(face)
     board.DISPLAY.show(splash)
     board.DISPLAY.wait_for_frame()