updated hacking rules

1) Added comment for H231, which we were already enforcing. H231
is for Python 3.x compatible except statements.

2) Added check for H201, which we were enforcing in reviews
but waiting on hacking checks to be updated. H201 is for bare
except statements, and the update in upstream hacking is to
support the "  # noqa" flag on it.

The H201 check catches some existing bare excepts that are fixed.

Change-Id: I68638aa9ea925ef62f9035a426548c2c804911a8

swift/common/middleware/x_profile/html_viewer.py

@@ -313,6 +313,9 @@ class HTMLViewer(object):
             return empty_description, headers
         try:
             stats = Stats2(*log_files)
+        except (IOError, ValueError):
+            raise DataLoadFailure(_('Can not load profile data from %s.')
+                                  % log_files)
         if not fulldirs:
             stats.strip_dirs()
         stats.sort_stats(sort)
@@ -359,9 +362,6 @@ class HTMLViewer(object):
              'profilehtml': profile_html,
              })
         return content, headers
-        except:
-            raise DataLoadFailure(_('Can not load profile data from %s.')
-                                  % log_files)
 
     def download(self, log_files, sort='time', limit=-1, nfl_filter='',
                  output_format='default'):
@@ -438,7 +438,7 @@ class HTMLViewer(object):
         file_path = nfls[0]
         try:
             lineno = int(nfls[1])
-        except:
+        except (TypeError, ValueError, IndexError):
             lineno = 0
         # for security reason, this need to be fixed.
         if not file_path.endswith('.py'):

swift/common/middleware/xprofile.py

@@ -242,7 +242,6 @@ class ProfileMiddleware(object):
                 start_response('500 Internal Server Error', [])
                 return _('Error on render profiling results: %s') % ex
         else:
-            try:
             _locals = locals()
             code = self.unwind and PROFILE_EXEC_EAGER or\
                 PROFILE_EXEC_LAZY
@@ -250,10 +249,6 @@ class ProfileMiddleware(object):
             app_iter = _locals['app_iter_']
             self.dump_checkpoint()
             return app_iter
-            except:
-                self.logger.exception(_('Error profiling code'))
-            finally:
-                pass
 
     def renew_profile(self):
         self.profiler = get_profiler(self.profile_module)

swift/container/reconciler.py

@@ -732,7 +732,7 @@ class ContainerReconciler(Daemon):
         """
         try:
             self.reconcile()
-        except:
+        except:  # noqa
             self.logger.exception('Unhandled Exception trying to reconcile')
         self.log_stats(force=True)
 

test/unit/cli/test_recon.py

@@ -99,7 +99,7 @@ class TestRecon(unittest.TestCase):
     def tearDown(self, *_args, **_kwargs):
         try:
             os.remove(self.tmpfile_name)
-        except:
+        except OSError:
             pass
 
     def test_gen_stats(self):

tox.ini

@@ -58,10 +58,11 @@ commands = python setup.py build_sphinx
 # it's not a bug that we aren't using all of hacking
 # H102 -> apache2 license exists
 # H103 -> license is apache
-# H201 -> no bare excepts # add when hacking supports noqa
+# H201 -> no bare excepts (unless marked with "  # noqa")
+# H231 -> Check for except statements to be Python 3.x compatible
 # H501 -> don't use locals() for str formatting
 # H903 -> \n not \r\n
 ignore = H
-select = F,E,W,H102,H103,H501,H903,H231
+select = F,E,W,H102,H103,H201,H231,H501,H903
 exclude = .venv,.tox,dist,doc,*egg
 show-source = True