error fix

app.py

@@ -122,16 +122,24 @@ def predict(input_img, ver):
     source = drawing.split()
 
     R, G, B = 0, 1, 2
-    constant = 2.0  # constant by which each pixel is divided
+    # constant by which each pixel is divided
 
-    Red = source[R].point(lambda i: i / constant if i < 200 else i)
-    Green = source[G].point(lambda i: i / constant if i < 200 else i)
-    Blue = source[B].point(lambda i: i / constant if i < 200 else i)
+    Red = source[R].point(darken_pixel)
+    Green = source[G].point(darken_pixel)
+    Blue = source[B].point(darken_pixel)
 
     im_output = Image.merge(im_output.mode, (Red, Green, Blue))
     return im_output
 
 
+def darken_pixel(pixel):
+    constant = 2.0
+    if pixel < 200:
+        return pixel / constant
+    else:
+        return pixel
+
+
 title = "Image to Line Drawings - Complex and Simple Portraits and Landscapes"
 examples = [
     ["01.jpg", "Complex Lines"],