Simple testing (and demonstration) script

test.py

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+orig_file = '/tmp/ceny.png'
+new_file = '/tmp/new.png'
+
+import lib
+pic = lib.Picture.load(orig_file)
+pic.show()
+
+import nn
+Interp = nn.Nearest()
+pix = Interp.interpolate(pic, 200, 200)
+pix.show()
+pix.save(new_file)