diff --git a/btt/bno_plot.py b/btt/bno_plot.py
index aa92480..d84fd25 100644
--- a/btt/bno_plot.py
+++ b/btt/bno_plot.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/python3
 #
 # btt blkno plotting interface
 #
@@ -38,6 +38,8 @@ automatically push the keys under the graph.
 To exit the plotter, enter 'quit' or ^D at the 'gnuplot> ' prompt.
 """
 
+from __future__ import absolute_import
+from __future__ import print_function
 import getopt, glob, os, sys, tempfile
 
 verbose	= 0
@@ -60,14 +62,14 @@ def parse_args(in_args):
 
 	try:
 		(opts, args) = getopt.getopt(in_args, s_opts, l_opts)
-	except getopt.error, msg:
-		print >>sys.stderr, msg
-		print >>sys.stderr, __doc__
+	except getopt.error as msg:
+		print(msg, file=sys.stderr)
+		print(__doc__, file=sys.stderr)
 		sys.exit(1)
 
 	for (o, a) in opts:
 		if o in ('-h', '--help'):
-			print __doc__
+			print(__doc__)
 			sys.exit(0)
 		elif o in ('-v', '--verbose'):
 			verbose += 1
@@ -84,10 +86,10 @@ if __name__ == '__main__':
 	(bnos, keys_below) = parse_args(sys.argv[1:])
 
 	if verbose:
-		print 'Using files:',
-		for bno in bnos: print bno,
-		if keys_below:	print '\nKeys are to be placed below graph'
-		else:		print ''
+		print('Using files:', end=' ')
+		for bno in bnos: print(bno, end=' ')
+		if keys_below:	print('\nKeys are to be placed below graph')
+		else:		print('')
 
 	tmpdir = tempfile.mktemp()
 	os.mkdir(tmpdir)
@@ -99,7 +101,7 @@ if __name__ == '__main__':
 		fo = open(t, 'w')
 		for line in open(f, 'r'):
 			fld = line.split(None)
-			print >>fo, fld[0], fld[1], int(fld[2])-int(fld[1])
+			print(fld[0], fld[1], int(fld[2])-int(fld[1]), file=fo)
 		fo.close()
 
 		t = t[t.rfind('/')+1:]
@@ -107,16 +109,16 @@ if __name__ == '__main__':
 		else:                plot_cmd = "%s,'%s'" % (plot_cmd, t)
 
 	fo = open('%s/plot.cmds' % tmpdir, 'w')
-	print >>fo, cmds
-	if len(bnos) > 10 or keys_below: print >>fo, 'set key below'
-	print >>fo, plot_cmd
+	print(cmds, file=fo)
+	if len(bnos) > 10 or keys_below: print('set key below', file=fo)
+	print(plot_cmd, file=fo)
 	fo.close()
 
 	pid = os.fork()
 	if pid == 0:
 		cmd = 'gnuplot %s/plot.cmds -' % tmpdir
 
-		if verbose: print 'Executing %s' % cmd
+		if verbose: print('Executing %s' % cmd)
 
 		os.chdir(tmpdir)
 		os.system(cmd)
diff --git a/btt/btt_plot.py b/btt/btt_plot.py
index b81dad5..a9a534b 100755
--- a/btt/btt_plot.py
+++ b/btt/btt_plot.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/python3
 #
 # btt_plot.py: Generate matplotlib plots for BTT generate data files
 #
@@ -55,6 +55,10 @@ Arguments:
   but the -o (--output) and -T (--title) options will be ignored.
 """
 
+from __future__ import absolute_import
+from __future__ import print_function
+import six
+from six.moves import range
 __author__ = 'Alan D. Brunelle <alan.brunelle@hp.com>'
 
 #------------------------------------------------------------------------------
@@ -82,7 +86,7 @@ get_base 	= lambda file: file[file.find('_')+1:file.rfind('_')]
 def fatal(msg):
 	"""Generate fatal error message and exit"""
 
-	print >>sys.stderr, 'FATAL: %s' % msg
+	print('FATAL: %s' % msg, file=sys.stderr)
 	sys.exit(1)
 
 #------------------------------------------------------------------------------
@@ -163,7 +167,7 @@ def get_data(files):
 		if not os.path.exists(file):
 			fatal('%s not found' % file)
 		elif verbose:
-			print 'Processing %s' % file
+			print('Processing %s' % file)
 
 		xs = []
 		ys = []
@@ -214,8 +218,8 @@ def parse_args(args):
 
 	try:
 		(opts, args) = getopt.getopt(args[1:], s_opts, l_opts)
-	except getopt.error, msg:
-		print >>sys.stderr, msg
+	except getopt.error as msg:
+		print(msg, file=sys.stderr)
 		fatal(__doc__)
 
 	for (o, a) in opts:
@@ -293,15 +297,15 @@ def generate_output(type, db):
 	def color(idx, style):
 		"""Returns a color/symbol type based upon the index passed."""
 
-                colors = [ 'b', 'g', 'r', 'c', 'm', 'y', 'k' ]
+		colors = [ 'b', 'g', 'r', 'c', 'm', 'y', 'k' ]
 		l_styles = [ '-', ':', '--', '-.' ]
 		m_styles = [ 'o', '+', '.', ',', 's', 'v', 'x', '<', '>' ]
 
 		color = colors[idx % len(colors)]
 		if style == 'line':
-			style = l_styles[(idx / len(l_styles)) % len(l_styles)]
+			style = l_styles[int((idx / len(l_styles)) % len(l_styles))]
 		elif style == 'marker':
-			style = m_styles[(idx / len(m_styles)) % len(m_styles)]
+			style = m_styles[int((idx / len(m_styles)) % len(m_styles))]
 
 		return '%s%s' % (color, style)
 
@@ -314,7 +318,7 @@ def generate_output(type, db):
 		ofile = '%s.png' % type
 
 	if verbose:
-		print 'Generating plot into %s' % ofile
+		print('Generating plot into %s' % ofile)
 
 	fig = plt.figure(figsize=plot_size)
 	ax = fig.add_subplot(111)
@@ -329,7 +333,7 @@ def generate_output(type, db):
 		legends = None
 
 	keys = []
-	for file in db.iterkeys():
+	for file in six.iterkeys(db):
 		if not file in ['min_x', 'max_x', 'min_y', 'max_y']:
 			keys.append(file)