Fixing graphics examples

Author: pavanky

examples/graphics/conway.py

@@ -66,7 +66,7 @@
     A2 = (state == 0) & C1
     A3 = (state == 1) & (neighborhood > 3)
 
-    display = (af.join(2, A0 + A1, A1 + A2, A3).as_type(af.Dtype.f32)
+    display = af.join(2, A0 + A1, A1 + A2, A3).as_type(af.Dtype.f32)
 
     state = state * C0 + C1
 

examples/graphics/histogram.py

@@ -29,7 +29,7 @@
     hist_win = af.Window(512, 512, "3D Plot example using ArrayFire")
     img_win  = af.Window(480, 640, "Input Image")
 
-    img = (af.load_image(sys.argv[1])).(af.Dtype.u8)
+    img = af.load_image(sys.argv[1]).as_type(af.Dtype.u8)
     hist = af.histogram(img, 256, 0, 255)
 
     while (not hist_win.close()) and (not img_win.close()):