Merge pull request #13 from jmespath/py3

Update jp-compliance to run on python3

Author: jamesls

bin/jp-compliance

@@ -137,12 +137,14 @@ class ComplianceTestRunner(object):
             process = subprocess.Popen(command, stdout=subprocess.PIPE,
                                        stderr=subprocess.PIPE,
                                        stdin=subprocess.PIPE)
-        except Exception, e:
+        except Exception as e:
             raise RuntimeError('Could not execute test executable "%s": '
                                '%s' % (' '.join(command), e))
-        process.stdin.write(json.dumps(test_case['given']))
+        process.stdin.write(json.dumps(test_case['given']).encode('utf-8'))
         process.stdin.flush()
         stdout, stderr = process.communicate()
+        stdout = stdout.decode('utf-8')
+        stderr = stderr.decode('utf-8')
         if 'result' in test_case:
             try:
                 actual = json.loads(stdout)
@@ -271,7 +273,7 @@ def main():
     else:
         try:
             runner.run_tests(args.stop_first_fail)
-        except Exception, e:
+        except Exception as e:
             sys.stderr.write(str(e))
             sys.stderr.write("\n")
             return 1