Simplify code by using some new Python syntax

- PEP 308: Conditional Expressions
- PEP 341: Unified try/except/finally
- PEP 343: The ‘with’ statement

product/CMFActivity/ActivityBuffer.py

@@ -78,7 +78,6 @@ class ActivityBuffer(TM):
 
   def _finish(self):
     # LOG('ActivityBuffer', 0, '_finish %r' % (self,))
-    try:
     try:
       # Try to push / delete all messages
       for activity, message in self.flushed_activity:

product/CMFActivity/ActivityTool.py

@@ -884,9 +884,7 @@ class ActivityTool (Folder, UniqueObject):
       in zope.conf. The Default is every 5 seconds.
       """
       # Prevent TimerService from starting multiple threads in parallel
-        acquired = timerservice_lock.acquire(0)
-        if not acquired:
-          return
+      if timerservice_lock.acquire(0):
         try:
           # make sure our skin is set-up. On CMF 1.5 it's setup by acquisition,
           # but on 2.2 it's by traversal, and our site probably wasn't traversed
@@ -895,7 +893,6 @@ class ActivityTool (Folder, UniqueObject):
           # both setupCurrentSkin and REQUEST are acquired from containers.
           self.setupCurrentSkin(self.REQUEST)
           old_sm = getSecurityManager()
-          try:
           try:
             # get owner of portal_catalog, so normally we should be able to
             # have the permission to invoke all activities
@@ -907,7 +904,7 @@ class ActivityTool (Folder, UniqueObject):
             processing_node_list = self.getNodeList(role=ROLE_PROCESSING)
 
             # only distribute when we are the distributingNode
-              if (self.getDistributingNode() == currentNode):
+            if self.getDistributingNode() == currentNode:
               self.distribute(len(processing_node_list))
 
             # SkinsTool uses a REQUEST cache to store skin objects, as
@@ -920,13 +917,14 @@ class ActivityTool (Folder, UniqueObject):
               pass
 
             # call tic for the current processing_node
-              # the processing_node numbers are the indices of the elements in the node tuple +1
-              # because processing_node starts form 1
+            # the processing_node numbers are the indices of the elements
+            # in the node tuple +1 because processing_node starts form 1
             if currentNode in processing_node_list:
-                self.tic(processing_node_list.index(currentNode)+1)
+              self.tic(processing_node_list.index(currentNode) + 1)
           except:
             # Catch ALL exception to avoid killing timerserver.
-              LOG('ActivityTool', ERROR, 'process_timer received an exception', error=sys.exc_info())
+            LOG('ActivityTool', ERROR, 'process_timer received an exception',
+                error=sys.exc_info())
           finally:
             setSecurityManager(old_sm)
         finally:
@@ -984,8 +982,7 @@ class ActivityTool (Folder, UniqueObject):
         while has_awake_activity:
           has_awake_activity = 0
           for activity in activity_list:
-            acquired = is_running_lock.acquire(0)
-            if acquired:
+            if is_running_lock.acquire(0):
               try:
                 activity.tic(inner_self, processing_node) # Transaction processing is the responsability of the activity
                 has_awake_activity = has_awake_activity or activity.isAwake(inner_self, processing_node)

product/ERP5/Document/TradeModelPath.py

@@ -192,7 +192,7 @@ class TradeModelPath(Path):
     #  * remove categories which base name is not category
     #  * respect base parameter
     prefix = category + '/'
-    start_index = not base and len(prefix) or 0
+    start_index = 0 if base else len(prefix)
     return [category[start_index:]
             for category in category_list
             if category.startswith(prefix)]

product/ERP5/Extensions/CheckSkins.py

@@ -179,11 +179,9 @@ def fixSkinNames(self, REQUEST=None, file=None, dry_run=0):
     msg += 'This does not modify anything by default. If you really want to fix skin names, specify %s/ERP5Site_fixSkinNames?file=NAME&dry_run=0 \n\n' % self.absolute_url()
     return msg
 
-  file = os.path.join(data_dir, file)
-  file = open(file, 'r')
+  with open(os.path.join(data_dir, file)) as file:
     class NamingInformation: pass
     info_list = []
-  try:
     reader = csv.reader(file)
     for row in reader:
       folder, name, new_name, meta_type = row[:4]
@@ -205,8 +203,6 @@ def fixSkinNames(self, REQUEST=None, file=None, dry_run=0):
       info.regexp = re.compile('\\b' + re.escape(name) + '\\b') # This is used to search the name
       info.removed = removed
       info_list.append(info)
-  finally:
-    file.close()
 
   # Now we have information enough. Check the skins.
   msg = ''
@@ -232,11 +228,8 @@ def fixSkinNames(self, REQUEST=None, file=None, dry_run=0):
         msg += '%s\n' % line
         if not dry_run:
           if skin.meta_type in fs_skin_spec:
-            f = open(expandpath(skin.getObjectFSPath()), 'w')
-            try:
+            with open(expandpath(skin.getObjectFSPath()), 'w') as f:
               f.write(text)
-            finally:
-              f.close()
           else:
             REQUEST['BODY'] = text
             skin.manage_FTPput(REQUEST, REQUEST.RESPONSE)

product/ERP5/Tool/AlarmTool.py

@@ -206,8 +206,7 @@ class AlarmTool(BaseTool):
       This method is called by TimerService in the interval given
       in zope.conf. The Default is every 5 seconds.
     """
-    acquired = last_tic_lock.acquire(0)
-    if not acquired:
+    if not last_tic_lock.acquire(0):
       return
     try:
       # make sure our skin is set-up. On CMF 1.5 it's setup by acquisition,

product/ERP5/Tool/IntrospectionTool.py

@@ -141,7 +141,9 @@ class IntrospectionTool(LogMixin, BaseTool):
     if compressed:
       tmp_file_path = tempfile.mktemp(dir=tmp_file_path)
       tmp_file = tarfile.open(tmp_file_path,"w:gz")
+      try:
         tmp_file.add(file_path)
+      finally:
         tmp_file.close()
       RESPONSE.setHeader('Content-type', 'application/x-tar')
       RESPONSE.setHeader('Content-Disposition', \
@@ -154,13 +156,10 @@ class IntrospectionTool(LogMixin, BaseTool):
       tmp_file_path = file_path
 
 
-    f = open(tmp_file_path)
-    try:
+    with open(tmp_file_path) as f:
       RESPONSE.setHeader('Content-Length', os.stat(tmp_file_path).st_size)
       for data in f:
         RESPONSE.write(data)
-    finally:
-      f.close()
 
     if compressed:
       os.remove(tmp_file_path)
@@ -190,30 +189,21 @@ class IntrospectionTool(LogMixin, BaseTool):
 
     char_per_line = 75
 
-    tailed_file = open(log_file,'r')
+    with open(log_file,'r') as tailed_file:
       while 1:
         try:
           tailed_file.seek(-1 * char_per_line * line_number, 2)
         except IOError:
           tailed_file.seek(0)
-      if tailed_file.tell() == 0:
-        at_start = 1
-      else:
-        at_start = 0
+        pos = tailed_file.tell()
 
         lines = tailed_file.read().split("\n")
-      if (len(lines) > (line_number + 1)) or at_start:
+        if len(lines) > (line_number + 1) or not pos:
           break
         # The lines are bigger than we thought
-      char_per_line = char_per_line * 1.3  # Inc for retry
-
-    tailed_file.close()
-
-    if len(lines) > line_number:
-      start = len(lines) - line_number - 1
-    else:
-      start = 0
+        char_per_line *= 1.3  # Inc for retry
 
+    start = max(len(lines) - line_number - 1, 0)
     return "\n".join(lines[start:len(lines)])
 
   security.declareProtected(Permissions.ManagePortal, 'tailEventLog')
@@ -330,19 +320,16 @@ class IntrospectionTool(LogMixin, BaseTool):
     """
     def cached_getSystemVersionDict():
       import pkg_resources
-      def tuple_to_format_str(t):
-         return '.'.join([str(i) for i in t])
-
       version_dict = {}
       for dist in pkg_resources.working_set:
         version_dict[dist.key] = dist.version
 
       from Products import ERP5 as erp5_product
-      erp5_product_path = erp5_product.__file__.split("/")[:-1]
+      erp5_product_path = os.path.dirname(erp5_product.__file__)
       try:
-        erp5_v = open("/".join((erp5_product_path) + ["VERSION.txt"])).read().strip()
-        erp5_version = erp5_v.replace("ERP5 ", "")
-      except:
+        with open(os.path.join(erp5_product_path, "VERSION.txt")) as f:
+          erp5_version = f.read().strip().replace("ERP5 ", "")
+      except Exception:
         erp5_version = None
 
       version_dict["ProductS.ERP5"] = erp5_version

product/ERP5/Tool/TemplateTool.py

@@ -298,13 +298,10 @@ class TemplateTool (BaseTool):
       """
         Import template from a temp file (as uploaded by the user)
       """
-      file = open(path, 'rb')
-      try:
+      with open(path, 'rb') as file:
         # read magic key to determine wich kind of bt we use
         file.seek(0)
         magic = file.read(5)
-      finally:
-        file.close()
 
       if magic == '<?xml': # old version
         self._importObjectFromFile(path, id=id)
@@ -342,11 +339,8 @@ class TemplateTool (BaseTool):
           prop_dict.pop('id', '')
           bt.edit(**prop_dict)
           # import all other files from bt
-          fobj = open(path, 'rb')
-          try:
+          with open(path, 'rb') as fobj:
             bt.importFile(file=fobj)
-          finally:
-            fobj.close()
         finally:
           tar.close()
       return bt
@@ -398,7 +392,8 @@ class TemplateTool (BaseTool):
           if not os.path.exists(prop_path):
             value = None
           else:
-            value = open(prop_path, 'rb').read()
+            with open(prop_path, 'rb') as f:
+              value = f.read()
           if value is 'None':
             # At export time, we used to export non-existent properties:
             #   str(obj.getProperty('non-existing')) == 'None'
@@ -523,11 +518,8 @@ class TemplateTool (BaseTool):
       tempid, temppath = mkstemp()
       try:
         os.close(tempid) # Close the opened fd as soon as possible
-        tempfile = open(temppath, 'wb')
-        try:
+        with open(temppath, 'wb') as tempfile:
           tempfile.write(import_file.read())
-        finally:
-          tempfile.close()
         bt = self._importBT(temppath, id)
       finally:
         os.remove(temppath)

product/ERP5Catalog/tests/testERP5Catalog.py

@@ -427,13 +427,8 @@ class TestERP5Catalog(ERP5TypeTestCase, LogInterceptor):
     #if uid_buffer_key in uid_buffer_dict:
     #  del uid_buffer_dict[uid_buffer_key]
     def getUIDBuffer(*args, **kw):
-      uid_lock = catalog.__class__._reserved_uid_lock
-      uid_lock.acquire()
-      try:
-        result = catalog.getUIDBuffer(*args, **kw)
-      finally:
-        uid_lock.release()
-      return result
+      with catalog.__class__._reserved_uid_lock:
+        return catalog.getUIDBuffer(*args, **kw)
 
     getUIDBuffer(force_new_buffer=True)
 

product/ERP5Form/ListBox.py

@@ -2343,8 +2343,8 @@ class ListBoxHTMLRendererLine(ListBoxRendererLine):
     url_column_dict = dict(renderer.getUrlColumnList())
     selection = renderer.getSelection()
     selection_name = renderer.getSelectionName()
-    ignore_layout = int(request.get('ignore_layout', \
-                        not request.get('is_web_mode', False) and 1 or 0))
+    ignore_layout = int(request.get('ignore_layout',
+                        0 if request.get('is_web_mode') else 1))
     editable_mode = int(request.get('editable_mode', 0))
     ui_domain = 'erp5_ui'
     # We need a way to pass the current line object (ie. brain) to the

product/ERP5Type/Tool/ClassTool.py

@@ -976,33 +976,25 @@ class %s(Constraint):
           # Create an empty __init__.py.
           init = os.path.join(path, '__init__.py')
           if not os.path.exists(init):
-            f = open(init, 'w')
-            f.close()
+            open(init, 'w').close()
           # For convenience, make .cvsignore.
           if generate_cvsignore:
             cvsignore = os.path.join(path, '.cvsignore')
             if not os.path.exists(cvsignore):
-              f = open(cvsignore, 'w')
-              try:
+              with open(cvsignore, 'w') as f:
                 f.write('*.pyc' + os.linesep)
-              finally:
-                f.close()
 
         # Create a Permissions module for this Product.
         permissions = os.path.join(base_path, 'Permissions.py')
         if not os.path.exists(permissions):
-          f = open(permissions, 'w')
-          f.close()
+          open(permissions, 'w').close()
 
         # Make .cvsignore for convenience.
         if generate_cvsignore:
           cvsignore = os.path.join(base_path, '.cvsignore')
           if not os.path.exists(cvsignore):
-            f = open(cvsignore, 'w')
-            try:
+            with open(cvsignore, 'w') as f:
               f.write('*.pyc' + os.linesep)
-            finally:
-              f.close()
 
         # Create an init file for this Product.
         init = os.path.join(base_path, '__init__.py')
@@ -1055,11 +1047,8 @@ def initialize( context ):
                          content_constructors = (),
                          content_classes = ())
 ''' % COPYRIGHT
-          f = open(init, 'w')
-          try:
+          with open(init, 'w') as f:
             f.write(text)
-          finally:
-            f.close()
 
         # Create a skeleton README.txt.
         readme = os.path.join(base_path, 'README.txt')
@@ -1069,11 +1058,8 @@ def initialize( context ):
 
   %s was automatically generated by ERP5 Class Tool.
 ''' % (product_id, product_id)
-          f = open(readme, 'w')
-          try:
+          with open(readme, 'w') as f:
             f.write(text)
-          finally:
-            f.close()
 
         # Now, copy selected code.
         for d, m, id_list in (('Document', readLocalDocument, document_id_list),
@@ -1084,11 +1070,8 @@ def initialize( context ):
           for class_id in id_list:
             path = os.path.join(base_path, d, class_id) + '.py'
             text = m(class_id)
-            f = open(path, 'w')
-            try:
+            with open(path, 'w') as f:
               f.write(text)
-            finally:
-              f.close()
 
         if REQUEST is not None:
           REQUEST.RESPONSE.redirect('%s/manage_viewProductGeneration?manage_tabs_message=New+Product+Saved+In+%s' % (self.absolute_url(), base_path))

product/ERP5Type/Utils.py

@@ -536,12 +536,8 @@ def readLocalPropertySheet(class_id):
   instance_home = getConfiguration().instancehome
   path = os.path.join(instance_home, "PropertySheet")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
-    text = f.read()
-  finally:
-    f.close()
-  return text
+  with open(path) as f:
+    return f.read()
 
 def writeLocalPropertySheet(class_id, text, create=1, instance_home=None):
   if instance_home is None:
@@ -554,11 +550,8 @@ def writeLocalPropertySheet(class_id, text, create=1, instance_home=None):
   if create:
     if os.path.exists(path):
       raise IOError, 'the file %s is already present' % path
-  f = open(path, 'w')
-  try:
+  with open(path, 'w') as f:
     f.write(text)
-  finally:
-    f.close()
   # load the file, so that an error is raised if file is invalid
   module = imp.load_source(class_id, path)
   getattr(module, class_id)
@@ -570,8 +563,7 @@ def importLocalPropertySheet(class_id, path = None):
     instance_home = getConfiguration().instancehome
     path = os.path.join(instance_home, "PropertySheet")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
+  with open(path) as f:
     module = imp.load_source(class_id, path, f)
     klass = None
     try:
@@ -582,8 +574,6 @@ def importLocalPropertySheet(class_id, path = None):
     setattr(PropertySheet, class_id, klass)
     # Register base categories
     registerBaseCategories(klass)
-  finally:
-    f.close()
 
 base_category_dict = {}
 def registerBaseCategories(property_sheet):
@@ -608,11 +598,8 @@ def importLocalInterface(module_id, path = None, is_erp5_type=False):
       instance_home = getConfiguration().instancehome
       path = os.path.join(instance_home, "interfaces")
     path = os.path.join(path, "%s.py" % module_id)
-    f = open(path)
-    try:
+    with open(path) as f:
       module = imp.load_source(class_id, path, f)
-    finally:
-      f.close()
     from zope.interface import Interface
     from Products.ERP5Type import interfaces
     InterfaceClass = type(Interface)
@@ -627,12 +614,9 @@ def importLocalConstraint(class_id, path = None):
     instance_home = getConfiguration().instancehome
     path = os.path.join(instance_home, "Constraint")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
+  with open(path) as f:
     module = imp.load_source(class_id, path, f)
     setattr(Products.ERP5Type.Constraint, class_id, getattr(module, class_id))
-  finally:
-    f.close()
 
 def importLocalInteractor(class_id, path=None):
   import Products.ERP5Type.Interactor
@@ -640,13 +624,10 @@ def importLocalInteractor(class_id, path=None):
     instance_home = getConfiguration().instancehome
     path = os.path.join(instance_home, "Interactor")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
+  with open(path) as f:
     module = imp.load_source(class_id, path, f)
     setattr(Products.ERP5Type.Interactor, class_id, getattr(module, class_id))
     registerInteractorClass(class_id, getattr(Products.ERP5Type.Interactor, class_id))
-  finally:
-    f.close()
 
 def getLocalExtensionList():
   if not getConfiguration:
@@ -699,12 +680,8 @@ def readLocalExtension(class_id):
   instance_home = getConfiguration().instancehome
   path = os.path.join(instance_home, "Extensions")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
-    text = f.read()
-  finally:
-    f.close()
-  return text
+  with open(path) as f:
+    return f.read()
 
 def removeLocalTest(class_id):
   instance_home = getConfiguration().instancehome
@@ -718,23 +695,15 @@ def readLocalTest(class_id):
   instance_home = getConfiguration().instancehome
   path = os.path.join(instance_home, "tests")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
-    text = f.read()
-  finally:
-    f.close()
-  return text
+  with open(path) as f:
+    return f.read()
 
 def readLocalConstraint(class_id):
   instance_home = getConfiguration().instancehome
   path = os.path.join(instance_home, "Constraint")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
-    text = f.read()
-  finally:
-    f.close()
-  return text
+  with open(path) as f:
+    return f.read()
 
 def writeLocalExtension(class_id, text, create=1, instance_home=None):
   if instance_home is None:
@@ -747,11 +716,8 @@ def writeLocalExtension(class_id, text, create=1, instance_home=None):
   if create:
     if os.path.exists(path):
       raise IOError, 'the file %s is already present' % path
-  f = open(path, 'w')
-  try:
+  with open(path, 'w') as f:
     f.write(text)
-  finally:
-    f.close()
 
 def writeLocalTest(class_id, text, create=1, instance_home=None):
   if instance_home is None:
@@ -764,11 +730,8 @@ def writeLocalTest(class_id, text, create=1, instance_home=None):
   if create:
     if os.path.exists(path):
       raise IOError, 'the file %s is already present' % path
-  f = open(path, 'w')
-  try:
+  with open(path, 'w') as f:
     f.write(text)
-  finally:
-    f.close()
 
 def writeLocalConstraint(class_id, text, create=1, instance_home=None):
   if instance_home is None:
@@ -781,11 +744,8 @@ def writeLocalConstraint(class_id, text, create=1, instance_home=None):
   if create:
     if os.path.exists(path):
       raise IOError, 'the file %s is already present' % path
-  f = open(path, 'w')
-  try:
+  with open(path, 'w') as f:
     f.write(text)
-  finally:
-    f.close()
   # load the file, so that an error is raised if file is invalid
   module = imp.load_source(class_id, path)
   getattr(module, class_id)
@@ -829,12 +789,8 @@ def readLocalDocument(class_id):
   instance_home = getConfiguration().instancehome
   path = os.path.join(instance_home, "Document")
   path = os.path.join(path, "%s.py" % class_id)
-  f = open(path)
-  try:
-    text = f.read()
-  finally:
-    f.close()
-  return text
+  with open(path) as f:
+    return f.read()
 
 def writeLocalDocument(class_id, text, create=1, instance_home=None):
   if instance_home is None:
@@ -849,11 +805,8 @@ def writeLocalDocument(class_id, text, create=1, instance_home=None):
       raise IOError, 'the file %s is already present' % path
   # check there is no syntax error (that's the most we can do at this time)
   compile(text, path, 'exec')
-  f = open(path, 'w')
-  try:
+  with open(path, 'w') as f:
     f.write(text)
-  finally:
-    f.close()
 
 def setDefaultClassProperties(property_holder):
   """Initialize default properties for ERP5Type Documents.

product/ERP5Type/dynamic/lazy_class.py

@@ -285,7 +285,6 @@ class PortalTypeMetaClass(GhostBaseMetaClass, PropertyHolder):
     from Products.ERP5.ERP5Site import getSite
     site = getSite()
     ERP5Base.aq_method_lock.acquire()
-    try:
     try:
       try:
         class_definition = generatePortalTypeClass(site, portal_type)

product/ERP5Type/patches/OFSUninstalled.py

@@ -27,8 +27,7 @@ if '__getstate__' not in Uninstalled.BrokenClass.__dict__:
   cache = Uninstalled.broken_klasses
 
   def Broken(self, oid, pair):
-    lock.acquire()
-    try:
+    with lock:
       cached = pair in cache
       result = Uninstalled_Broken(self, oid, pair)
       if not cached:
@@ -36,8 +35,6 @@ if '__getstate__' not in Uninstalled.BrokenClass.__dict__:
         assert not issubclass(klass, PersistentBroken), \
           "This monkey-patch is not useful anymore"
         cache[pair] = persistentBroken(klass)
-    finally:
-      lock.release()
     return result
 
   Uninstalled.Broken = Broken

product/ERP5Type/tests/DummyTaskDistributionTool.py

@@ -15,14 +15,11 @@ class DummyTaskDistributionTool(object):
     return None, revision
 
   def startUnitTest(self, test_result_path, exclude_list=()):
-    self.lock.acquire()
-    try:
+    with self.lock:
       for i, test in enumerate(self.test_name_list):
         if test not in exclude_list:
           del self.test_name_list[i]
           return None, test
-    finally:
-      self.lock.release()
 
   def stopUnitTest(self, test_path, status_dict):
     pass
\ No newline at end of file

product/ERP5Type/tests/ERP5TypeFunctionalTestCase.py

@@ -143,12 +143,8 @@ class Browser:
 
   def _createFile(self, filename, content):
     file_path = os.path.join(self.profile_dir, filename)
-    f = open(file_path, 'w')
-    try:
+    with open(file_path, 'w') as f:
       f.write(content)
-    finally:
-      f.close()
-
     return file_path
 
   def _setDisplay(self, display):

product/ERP5Type/tests/testERP5Type.py

@@ -289,9 +289,7 @@ class TestERP5Type(PropertySheetTestCase, LogInterceptor):
         raise WriteError
       portal.person_module.__class__._setLastId = _setLastId
       try:
-        try:
-          o = portal.person_module.newContent(portal_type="Person",
-                                              temp_object=1)
+        o = portal.person_module.newContent(portal_type="Person", temp_object=1)
       except WriteError:
         self.fail("Container last ID modified")
       finally:

product/ERP5VCS/Git.py

@@ -323,7 +323,7 @@ class Git(WorkingCopy):
     if push:
       # if we can't push because we are not up-to-date, we'll either 'merge' or
       # 'rebase' depending on we already have local commits or not
-      merge = self.getAheadCount() and 'merge' or 'rebase'
+      merge = 'merge' if self.getAheadCount() else 'rebase'
 
     selected_set = set(added)
     selected_set.update(modified)

product/ERP5VCS/Subversion.py

@@ -48,16 +48,13 @@ _chdir_lock = threading.RLock()
 @simple_decorator
 def chdir_working_copy(func):
   def decorator(self, *args, **kw):
-    _chdir_lock.acquire()
-    try:
+    with _chdir_lock:
       cwd = os.getcwd()
       try:
         os.chdir(self.working_copy)
         return func(self, *args, **kw)
       finally:
         os.chdir(cwd)
-    finally:
-      _chdir_lock.release()
   return decorator
 
 class Subversion(WorkingCopy):

product/ERP5VCS/WorkingCopy.py

@@ -209,11 +209,8 @@ class WorkingCopy(Implicit):
       revision = int(self.showOld(path)) + 1
     except NotVersionedError:
       return 1
-    file = open(os.path.join(self.working_copy, path), 'w')
-    try:
+    with open(os.path.join(self.working_copy, path), 'w') as file:
       file.write(str(revision))
-    finally:
-      file.close()
     return revision
 
   def hasDiff(self, path):
@@ -279,11 +276,8 @@ class WorkingCopy(Implicit):
     head = '<span style="font-weight: bold; color: black;">%s</span>' \
            % real_path
     try:
-      f = open(os.path.join(self.working_copy, path), 'rU')
-      try:
+      with open(os.path.join(self.working_copy, path), 'rU') as f:
         text = f.read()
-      finally:
-        f.close()
     except IOError, e:
       if e.errno == errno.EISDIR:
         return '%s<hr/>%r is a folder!' % (head, path)

product/ERP5eGovSecurity/EGOVUserManager.py

@@ -214,16 +214,14 @@ class EGOVUserManager(ERP5UserManager):
           sm = getSecurityManager()
           if sm.getUser().getId() != SUPER_USER:
             newSecurityManager(self, self.getUser(SUPER_USER))
-  
-          try:
           try:
             result = portal.portal_catalog.unrestrictedSearchResults(
                             select_expression='reference',
                             portal_type=self.portal_type_list, reference=login)
             if len(result) != 1: # we won't proceed with groups
               if len(result) > 1: # configuration is screwed
-                  raise ConsistencyError, 'There is more than one Person whose \
-                      login is %s : %s' % (user_name,
+                raise ConsistencyError('There is more than one Person whose'
+                    ' login is %s : %s' % (user_name,
                     repr([r.getObject() for r in catalog_result]))
               else: # no person is linked to this user login
                 # this permit to get the module of the application

product/ZSQLCatalog/SQLCatalog.py

@@ -697,8 +697,7 @@ class Catalog(Folder,
     """
       Import properties from an XML file.
     """
-    f = open(file)
-    try:
+    with open(file) as f:
       doc = parse(f)
       root = doc.documentElement
       try:
@@ -747,8 +746,6 @@ class Catalog(Folder,
             self.filter_dict[id]['expression_instance'] = None
       finally:
         doc.unlink()
-    finally:
-      f.close()
 
   def manage_historyCompare(self, rev1, rev2, REQUEST,
                             historyComparisonResults=''):