# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1443822191 -7200
# Node ID 244292b4816c6f1f9cf841645c6bfdd4e1c42567
# Parent  21c5d47536ea23890c1fd87bd197e47c293eec60
Use a proper main program!

diff -r 21c5d47536ea -r 244292b4816c dither.py
--- a/dither.py	Fri Oct 02 19:22:17 2015 +0200
+++ b/dither.py	Fri Oct 02 23:43:11 2015 +0200
@@ -17,8 +17,9 @@
 def dither(im, imp=None):
     return im.quantize(palette=imp or get_palette())
 
-im = PIL.Image.open(sys.argv[1])
-im2 = dither(im)
-im2.save(sys.argv[2])
+if __name__ == "__main__":
+    im = PIL.Image.open(sys.argv[1])
+    im2 = dither(im)
+    im2.save(sys.argv[2])
 
 # vim: tabstop=4 expandtab shiftwidth=4