[PATCH v2] perf scripts python: Add Python 3 support to failed-syscalls-by-pid.py

[Seeteena Thoufeek]

Support both Python 2 and Python 3 in failed-syscalls-by-pid.py.
``print`` is now a function rather than a statement. This should have
no functional change.

Fixes lambda syntax error.

Signed-off-by: Seeteena Thoufeek <s1seetee@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>

Please enter the commit message for your changes. Lines starting
---
 tools/perf/scripts/python/failed-syscalls-by-pid.py | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/tools/perf/scripts/python/failed-syscalls-by-pid.py b/tools/perf/scripts/python/failed-syscalls-by-pid.py
index cafeff3..a174755 100644
--- a/tools/perf/scripts/python/failed-syscalls-by-pid.py
+++ b/tools/perf/scripts/python/failed-syscalls-by-pid.py
@@ -4,6 +4,7 @@
 #
 # Displays system-wide failed system call totals, broken down by pid.
 # If a [comm] arg is specified, only syscalls called by [comm] are displayed.
+from __future__ import print_function
 
 import os
 import sys
@@ -32,7 +33,7 @@ if len(sys.argv) > 1:
 syscalls = autodict()
 
 def trace_begin():
-	print "Press control+C to stop and show the summary"
+	print("Press control+C to stop and show the summary")
 
 def trace_end():
 	print_error_totals()
@@ -57,22 +58,22 @@ def syscalls__sys_exit(event_name, context, common_cpu,
 
 def print_error_totals():
     if for_comm is not None:
-	    print "\nsyscall errors for %s:\n\n" % (for_comm),
+	    print("\nsyscall errors for %s:\n\n" % (for_comm)),
     else:
-	    print "\nsyscall errors:\n\n",
+	    print("\nsyscall errors:\n\n"),
 
-    print "%-30s  %10s\n" % ("comm [pid]", "count"),
-    print "%-30s  %10s\n" % ("------------------------------", \
-                                 "----------"),
+    print("%-30s  %10s\n" % ("comm [pid]", "count")),
+    print("%-30s  %10s\n" % ("------------------------------", \
+                                 "----------")),
 
     comm_keys = syscalls.keys()
     for comm in comm_keys:
 	    pid_keys = syscalls[comm].keys()
 	    for pid in pid_keys:
-		    print "\n%s [%d]\n" % (comm, pid),
+		    print("\n%s [%d]\n" % (comm, pid)),
 		    id_keys = syscalls[comm][pid].keys()
 		    for id in id_keys:
-			    print "  syscall: %-16s\n" % syscall_name(id),
+			    print("  syscall: %-16s\n" % syscall_name(id)),
 			    ret_keys = syscalls[comm][pid][id].keys()
-			    for ret, val in sorted(syscalls[comm][pid][id].iteritems(), key = lambda(k, v): (v, k),  reverse = True):
-				    print "    err = %-20s  %10d\n" % (strerror(ret), val),
+			    for ret, val in sorted(syscalls[comm][pid][id].iteritems(), key = lambda k_v: (k_v[1], k_v[0]),  reverse = True):
+				    print("    err = %-20s  %10d\n" % (strerror(ret), val)),
-- 
1.8.3.1