diff --git a/blktrace.spec b/blktrace.spec
index 91ab181962bceff5e365d801dc1e46bcbeb24a0e..892e711a773f51e86ff0b704b52b1eb81c15380f 100644
--- a/blktrace.spec
+++ b/blktrace.spec
@@ -1,6 +1,6 @@
 Name:    blktrace
 Version: 1.2.0
-Release: 11
+Release: 12
 Summary: Block IO tracer in the Linux kernel
 License: GPLv2+
 Source:  http://brick.kernel.dk/snaps/blktrace-%{version}.tar.bz2
@@ -13,6 +13,7 @@ Requires:      python3
 
 Patch0: blktrace-fix-btt-overflow.patch
 Patch1: remove-python2-dependency.patch
+Patch2: modify-python2-expression-to-python3.patch
 
 %description
 blktrace is a block layer IO tracing mechanism which provides detailed
@@ -47,6 +48,12 @@ make dest=%{buildroot} prefix=%{buildroot}/%{_prefix} mandir=%{buildroot}/%{_man
 %{_mandir}/man8/*
 
 %changelog
+* Wed Mar 18 2020 sunshihao<sunshihao@huawei.com> - 1.2.0-12
+- Type:enhancemnet
+- ID:NA
+- SUG:restart
+- DESCi:modify python2 expression to python3
+
 * Mon Feb 17 2020 sunshihao<sunshihao@huawei.com> - 1.2.0-11
 - Type:enhancemnet
 - ID:NA
diff --git a/modify-python2-expression-to-python3.patch b/modify-python2-expression-to-python3.patch
new file mode 100644
index 0000000000000000000000000000000000000000..abfb1562f67fcc9d835e82f703d244f9c459aca6
--- /dev/null
+++ b/modify-python2-expression-to-python3.patch
@@ -0,0 +1,90 @@
+From 0a4798b479a46c1f804901fd227fbd9bd84da32e Mon Sep 17 00:00:00 2001
+From: eulerstorage <eulerstorage@huawei.com>
+Date: Wed, 18 Mar 2020 18:31:54 +0800
+Subject: [PATCH] 456
+
+---
+ btt/bno_plot.py | 14 +++++++-------
+ btt/btt_plot.py |  8 ++++----
+ 2 files changed, 11 insertions(+), 11 deletions(-)
+
+diff --git a/btt/bno_plot.py b/btt/bno_plot.py
+index aa92480..3506f33 100644
+--- a/btt/bno_plot.py
++++ b/btt/bno_plot.py
+@@ -60,14 +60,14 @@ def parse_args(in_args):
+ 
+ 	try:
+ 		(opts, args) = getopt.getopt(in_args, s_opts, l_opts)
+-	except getopt.error, msg:
++	except getopt.error as msg:
+ 		print >>sys.stderr, msg
+ 		print >>sys.stderr, __doc__
+ 		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 +84,10 @@ 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:'),
++		for bno in bnos: print (bno),
++		if keys_below:	print ('\nKeys are to be placed below graph')
++		else:		print ('')
+ 
+ 	tmpdir = tempfile.mktemp()
+ 	os.mkdir(tmpdir)
+@@ -116,7 +116,7 @@ if __name__ == '__main__':
+ 	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..6e403ef 100755
+--- a/btt/btt_plot.py
++++ b/btt/btt_plot.py
+@@ -163,7 +163,7 @@ 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 = []
+@@ -214,7 +214,7 @@ def parse_args(args):
+ 
+ 	try:
+ 		(opts, args) = getopt.getopt(args[1:], s_opts, l_opts)
+-	except getopt.error, msg:
++	except getopt.error as msg:
+		print >>sys.stderr, msg
+ 		fatal(__doc__)
+ 
+ 	for (o, a) in opts:
+@@ -314,7 +314,7 @@ 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)
+-- 
+1.8.3.1
+