[benchtests] Fix compare_strings.py for python2

Python 2 does not have a FileNotFoundError so drop it in favour of
simply printing out the last (and most informative) line of the
exception.

	* benchtests/scripts/compare_strings.py: Import traceback.
	(parse_file): Pretty-print error.

1 files changed, 3 insertions, 2 deletions

diff --git a/benchtests/scripts/compare_strings.py b/benchtests/scripts/compare_strings.py
index e3ad8ff058..78e508fd91 100755
--- a/benchtests/scripts/compare_strings.py
+++ b/benchtests/scripts/compare_strings.py
@@ -29,6 +29,7 @@ import os
 import json
 import pylab
 import argparse
+import traceback
 
 try:
     import jsonschema as validator
@@ -45,8 +46,8 @@ def parse_file(filename, schema_filename):
                 bench = json.load(benchfile)
                 validator.validate(bench, schema)
         return bench
-    except FileNotFoundError:
-        sys.stderr.write('Invalid input file %s.\n' % filename)
+    except:
+        print(traceback.format_exc(limit=1))
         sys.exit(os.EX_NOINPUT)
 
 def draw_graph(f, v, ifuncs, results):