diff -r c68545f1aecb -r c34057d3c94e updaterevision.py
--- a/updaterevision.py	Sun Nov 28 23:53:23 2021 +0200
+++ b/updaterevision.py	Mon Dec 06 00:29:47 2021 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 #
 #	Copyright 2015 Teemu Piippo
@@ -30,7 +30,7 @@
 #	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-import md5, sys
+import hashlib, sys
 
 class OutputFile:
 	def __init__ (self, filename):
@@ -47,10 +47,10 @@
 		self.body += a
 
 	def save (self):
-		checksum = md5.new (self.body).hexdigest()
+		checksum = hashlib.md5(self.body.encode()).hexdigest()
 
 		if checksum == self.oldsum:
-			print '%s is up to date' % self.filename
+			print('%s is up to date' % self.filename)
 			return False
 
 		with open (self.filename, "w") as fp:
@@ -63,12 +63,12 @@
 	from datetime import datetime
 
 	if len (sys.argv) != 2:
-		print 'usage: %s <output>' % sys.argv[0]
+		print('usage: %s <output>' % sys.argv[0])
 		quit (1)
 
 	f = OutputFile (sys.argv[1])
 	data = subprocess.check_output (['hg', 'log', '-r.', '--template',
-		'{node|short} {branch} {date|hgdate}']).replace ('\n', '').split (' ')
+	    '{node|short} {branch} {date|hgdate}']).decode().replace ('\n', '').split (' ')
 
 	rev = data[0]
 	branch = data[1]
@@ -79,7 +79,7 @@
 	if len(rev) > 7:
 		rev = rev[0:7]
 
-	if subprocess.check_output (['hg', 'id', '-n']).replace ('\n', '')[-1] == '+':
+	if subprocess.check_output (['hg', 'id', '-n']).decode().replace ('\n', '')[-1] == '+':
 		rev += '+'
 
 	f.write ('#define HG_NODE "%s"\n' % rev)
@@ -88,7 +88,7 @@
 	f.write ('#define HG_DATE_STRING "%s"\n' % date.strftime ('%d %b %Y'))
 	f.write ('#define HG_DATE_TIME %d\n' % int (timestamp))
 	if f.save():
-		print '%s updated to %s' % (f.filename, rev)
+		print('%s updated to %s' % (f.filename, rev))
 
 if __name__ == '__main__':
-	main()
\ No newline at end of file
+	main()