--- a/misc/guess-ploidy.py	2017-04-07 04:52:44.000000000 -0500
+++ b/misc/guess-ploidy.py	2020-01-14 10:59:49.738128654 -0600
@@ -33,8 +33,8 @@
 csv.register_dialect('tab', delimiter='\t', quoting=csv.QUOTE_NONE)
 
 if len(sys.argv) != 3:
-    print >> sys.stderr, 'About: Plot output of "bcftools +guess-ploidy -v"'
-    print >> sys.stderr, 'Usage: guess-ploidy.py <guess-ploidy.out> <image-prefix>'
+    print('About: Plot output of "bcftools +guess-ploidy -v"', file=sys.stderr)
+    print('Usage: guess-ploidy.py <guess-ploidy.out> <image-prefix>', file=sys.stderr)
     sys.exit()
 
 prefix = sys.argv[2]