[oe-commits] [bitbake] 02/07: lib: amend code to use proper singleton comparisons where possible

git at git.openembedded.org git at git.openembedded.org
Sat Jan 18 17:47:22 UTC 2020


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rpurdie pushed a commit to branch master-next
in repository bitbake.

commit a149cfc6f6bb398330c0b2ee75c1ba17b6e9052c
Author: Frazer Clews <frazer.clews at codethink.co.uk>
AuthorDate: Thu Jan 16 17:11:19 2020 +0000

    lib: amend code to use proper singleton comparisons where possible
    
    amend the code to handle singleton comparisons properly so it only checks
    if they only refer to the same object or not, and not bother
    comparing the values.
    
    Signed-off-by: Frazer Clews <frazer.clews at codethink.co.uk>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 lib/bb/command.py                                    |  2 +-
 lib/bb/cooker.py                                     |  8 ++++----
 lib/bb/data.py                                       |  2 +-
 lib/bb/event.py                                      |  2 +-
 lib/bb/fetch2/__init__.py                            |  4 ++--
 lib/bb/fetch2/git.py                                 |  2 +-
 lib/bb/fetch2/osc.py                                 |  2 +-
 lib/bb/fetch2/perforce.py                            |  2 +-
 lib/bb/fetch2/ssh.py                                 |  2 +-
 lib/bb/parse/ast.py                                  | 20 ++++++++++----------
 lib/bb/providers.py                                  |  6 +++---
 lib/bb/taskdata.py                                   |  2 +-
 lib/bb/ui/buildinfohelper.py                         |  8 ++++----
 lib/bb/ui/knotty.py                                  |  2 +-
 lib/bb/ui/ncurses.py                                 |  2 +-
 lib/bb/ui/taskexp.py                                 |  2 +-
 lib/bb/ui/toasterui.py                               |  2 +-
 lib/bb/ui/uievent.py                                 |  2 +-
 lib/bs4/__init__.py                                  |  2 +-
 lib/bs4/builder/_html5lib.py                         |  2 +-
 lib/ply/yacc.py                                      |  6 +++---
 lib/prserv/db.py                                     | 14 +++++++-------
 lib/pyinotify.py                                     |  4 ++--
 .../bldcontrol/management/commands/checksettings.py  |  2 +-
 lib/toaster/orm/models.py                            |  4 ++--
 lib/toaster/toastergui/templatetags/projecttags.py   |  4 ++--
 lib/toaster/toastergui/views.py                      | 18 +++++++++---------
 .../toastermain/management/commands/buildimport.py   |  2 +-
 28 files changed, 65 insertions(+), 65 deletions(-)

diff --git a/lib/bb/command.py b/lib/bb/command.py
index 378f389..c8e1352 100644
--- a/lib/bb/command.py
+++ b/lib/bb/command.py
@@ -65,7 +65,7 @@ class Command:
             # Can run synchronous commands straight away
             command_method = getattr(self.cmds_sync, command)
             if ro_only:
-                if not hasattr(command_method, 'readonly') or False == getattr(command_method, 'readonly'):
+                if not hasattr(command_method, 'readonly') or not getattr(command_method, 'readonly'):
                     return None, "Not able to execute not readonly commands in readonly mode"
             try:
                 self.cooker.process_inotify_updates()
diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 3d65b0c..8407db8 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -1204,7 +1204,7 @@ class BBCooker:
             for c in collection_list:
                 calc_layer_priority(c)
                 regex = self.data.getVar("BBFILE_PATTERN_%s" % c)
-                if regex == None:
+                if regex is None:
                     parselog.error("BBFILE_PATTERN_%s not defined" % c)
                     errors = True
                     continue
@@ -1310,7 +1310,7 @@ class BBCooker:
         self.parseConfiguration()
 
         # If we are told to do the None task then query the default task
-        if (task == None):
+        if task is None:
             task = self.configuration.cmd
         if not task.startswith("do_"):
             task = "do_%s" % task
@@ -1454,7 +1454,7 @@ class BBCooker:
         self.buildSetVars()
 
         # If we are told to do the None task then query the default task
-        if (task == None):
+        if task is None:
             task = self.configuration.cmd
 
         if not task.startswith("do_"):
@@ -1687,7 +1687,7 @@ class CookerCollectFiles(object):
     def calc_bbfile_priority( self, filename, matched = None ):
         for _, _, regex, pri in self.bbfile_config_priorities:
             if regex.match(filename):
-                if matched != None:
+                if matched is not None:
                     if not regex in matched:
                         matched.add(regex)
                 return pri
diff --git a/lib/bb/data.py b/lib/bb/data.py
index 0d75d0c..6dc0217 100644
--- a/lib/bb/data.py
+++ b/lib/bb/data.py
@@ -79,7 +79,7 @@ def expand(s, d, varname = None):
     return d.expand(s, varname)
 
 def expandKeys(alterdata, readdata = None):
-    if readdata == None:
+    if readdata is None:
         readdata = alterdata
 
     todolist = {}
diff --git a/lib/bb/event.py b/lib/bb/event.py
index 42143e7..5cfbf36 100644
--- a/lib/bb/event.py
+++ b/lib/bb/event.py
@@ -346,7 +346,7 @@ def set_UIHmask(handlerNum, level, debug_domains, mask):
 
 def getName(e):
     """Returns the name of a class or class instance"""
-    if getattr(e, "__name__", None) == None:
+    if getattr(e, "__name__", None) is None:
         return e.__class__.__name__
     else:
         return e.__name__
diff --git a/lib/bb/fetch2/__init__.py b/lib/bb/fetch2/__init__.py
index 731c160..18a6819 100644
--- a/lib/bb/fetch2/__init__.py
+++ b/lib/bb/fetch2/__init__.py
@@ -1081,7 +1081,7 @@ def try_mirrors(fetch, d, origud, mirrors, check = False):
 
     for index, uri in enumerate(uris):
         ret = try_mirror_url(fetch, origud, uds[index], ld, check)
-        if ret != False:
+        if ret:
             return ret
     return None
 
@@ -1351,7 +1351,7 @@ class FetchMethod(object):
         """
 
         # We cannot compute checksums for directories
-        if os.path.isdir(urldata.localpath) == True:
+        if os.path.isdir(urldata.localpath):
             return False
         if urldata.localpath.find("*") != -1:
             return False
diff --git a/lib/bb/fetch2/git.py b/lib/bb/fetch2/git.py
index fa41b07..fe0a384 100644
--- a/lib/bb/fetch2/git.py
+++ b/lib/bb/fetch2/git.py
@@ -671,7 +671,7 @@ class Git(FetchMethod):
 
             # search for version in the line
             tag = tagregex.search(tag_head)
-            if tag == None:
+            if tag is None:
                 continue
 
             tag = tag.group('pver')
diff --git a/lib/bb/fetch2/osc.py b/lib/bb/fetch2/osc.py
index f55db6f..8f091ef 100644
--- a/lib/bb/fetch2/osc.py
+++ b/lib/bb/fetch2/osc.py
@@ -41,7 +41,7 @@ class Osc(FetchMethod):
         else:
             pv = d.getVar("PV", False)
             rev = bb.fetch2.srcrev_internal_helper(ud, d)
-            if rev and rev != True:
+            if rev:
                 ud.revision = rev
             else:
                 ud.revision = ""
diff --git a/lib/bb/fetch2/perforce.py b/lib/bb/fetch2/perforce.py
index b2ac11e..f57c2a4 100644
--- a/lib/bb/fetch2/perforce.py
+++ b/lib/bb/fetch2/perforce.py
@@ -104,7 +104,7 @@ class Perforce(FetchMethod):
         if command == 'changes':
             p4cmd = '%s%s changes -m 1 //%s' % (ud.basecmd, p4opt, pathnrev)
         elif command == 'print':
-            if depot_filename != None:
+            if depot_filename is not None:
                 p4cmd = '%s%s print -o "p4/%s" "%s"' % (ud.basecmd, p4opt, filename, depot_filename)
             else:
                 raise FetchError('No depot file name provided to p4 %s' % command, ud.url)
diff --git a/lib/bb/fetch2/ssh.py b/lib/bb/fetch2/ssh.py
index 34debe3..5e982ec 100644
--- a/lib/bb/fetch2/ssh.py
+++ b/lib/bb/fetch2/ssh.py
@@ -58,7 +58,7 @@ class SSH(FetchMethod):
     '''Class to fetch a module or modules via Secure Shell'''
 
     def supports(self, urldata, d):
-        return __pattern__.match(urldata.url) != None
+        return __pattern__.match(urldata.url) is not None
 
     def supports_checksum(self, urldata):
         return False
diff --git a/lib/bb/parse/ast.py b/lib/bb/parse/ast.py
index 362c1a3..eb8cfa2 100644
--- a/lib/bb/parse/ast.py
+++ b/lib/bb/parse/ast.py
@@ -89,7 +89,7 @@ class DataNode(AstNode):
         self.groupd = groupd
 
     def getFunc(self, key, data):
-        if 'flag' in self.groupd and self.groupd['flag'] != None:
+        if 'flag' in self.groupd and self.groupd['flag'] is not None:
             return data.getVarFlag(key, self.groupd['flag'], expand=False, noweakdefault=True)
         else:
             return data.getVar(key, False, noweakdefault=True, parsing=True)
@@ -102,36 +102,36 @@ class DataNode(AstNode):
             'file': self.filename,
             'line': self.lineno,
         }
-        if "exp" in groupd and groupd["exp"] != None:
+        if "exp" in groupd and groupd["exp"] is not None:
             data.setVarFlag(key, "export", 1, op = 'exported', **loginfo)
 
         op = "set"
-        if "ques" in groupd and groupd["ques"] != None:
+        if "ques" in groupd and groupd["ques"] is not None:
             val = self.getFunc(key, data)
             op = "set?"
-            if val == None:
+            if val is None:
                 val = groupd["value"]
-        elif "colon" in groupd and groupd["colon"] != None:
+        elif "colon" in groupd and groupd["colon"] is not None:
             e = data.createCopy()
             op = "immediate"
             val = e.expand(groupd["value"], key + "[:=]")
-        elif "append" in groupd and groupd["append"] != None:
+        elif "append" in groupd and groupd["append"] is not None:
             op = "append"
             val = "%s %s" % ((self.getFunc(key, data) or ""), groupd["value"])
-        elif "prepend" in groupd and groupd["prepend"] != None:
+        elif "prepend" in groupd and groupd["prepend"] is not None:
             op = "prepend"
             val = "%s %s" % (groupd["value"], (self.getFunc(key, data) or ""))
-        elif "postdot" in groupd and groupd["postdot"] != None:
+        elif "postdot" in groupd and groupd["postdot"] is not None:
             op = "postdot"
             val = "%s%s" % ((self.getFunc(key, data) or ""), groupd["value"])
-        elif "predot" in groupd and groupd["predot"] != None:
+        elif "predot" in groupd and groupd["predot"] is not None:
             op = "predot"
             val = "%s%s" % (groupd["value"], (self.getFunc(key, data) or ""))
         else:
             val = groupd["value"]
 
         flag = None
-        if 'flag' in groupd and groupd['flag'] != None:
+        if 'flag' in groupd and groupd['flag'] is not None:
             flag = groupd['flag']
         elif groupd["lazyques"]:
             flag = "_defaultval"
diff --git a/lib/bb/providers.py b/lib/bb/providers.py
index f80963c..81459c3 100644
--- a/lib/bb/providers.py
+++ b/lib/bb/providers.py
@@ -92,11 +92,11 @@ def preferredVersionMatch(pe, pv, pr, preferred_e, preferred_v, preferred_r):
     Check if the version pe,pv,pr is the preferred one.
     If there is preferred version defined and ends with '%', then pv has to start with that version after removing the '%'
     """
-    if (pr == preferred_r or preferred_r == None):
-        if (pe == preferred_e or preferred_e == None):
+    if pr == preferred_r or preferred_r is None:
+        if pe == preferred_e or preferred_e is None:
             if preferred_v == pv:
                 return True
-            if preferred_v != None and preferred_v.endswith('%') and pv.startswith(preferred_v[:len(preferred_v)-1]):
+            if preferred_v is not None and preferred_v.endswith('%') and pv.startswith(preferred_v[:len(preferred_v)-1]):
                 return True
     return False
 
diff --git a/lib/bb/taskdata.py b/lib/bb/taskdata.py
index 8c25e09..d13a124 100644
--- a/lib/bb/taskdata.py
+++ b/lib/bb/taskdata.py
@@ -362,7 +362,7 @@ class TaskData:
             bb.event.fire(bb.event.NoProvider(item, dependees=self.get_dependees(item), reasons=["No eligible PROVIDERs exist for '%s'" % item]), cfgData)
             raise bb.providers.NoProvider(item)
 
-        if len(eligible) > 1 and foundUnique == False:
+        if len(eligible) > 1 and not foundUnique:
             if item not in self.consider_msgs_cache:
                 providers_list = []
                 for fn in eligible:
diff --git a/lib/bb/ui/buildinfohelper.py b/lib/bb/ui/buildinfohelper.py
index 5cbca97..82c62e3 100644
--- a/lib/bb/ui/buildinfohelper.py
+++ b/lib/bb/ui/buildinfohelper.py
@@ -935,7 +935,7 @@ class BuildInfoHelper(object):
 
             # only reset the build name if the one on the server is actually
             # a valid value for the build_name field
-            if build_name != None:
+            if build_name is not None:
                 build_info['build_name'] = build_name
                 changed = True
 
@@ -1194,7 +1194,7 @@ class BuildInfoHelper(object):
         evdata = BuildInfoHelper._get_data_from_event(event)
 
         for t in self.internal_state['targets']:
-            if t.is_image == True:
+            if t.is_image:
                 output_files = list(evdata.keys())
                 for output in output_files:
                     if t.target in output and 'rootfs' in output and not output.endswith(".manifest"):
@@ -1236,7 +1236,7 @@ class BuildInfoHelper(object):
                 task_information['outcome'] = Task.OUTCOME_PREBUILT
         else:
             task_information['task_executed'] = True
-            if 'noexec' in vars(event) and event.noexec == True:
+            if 'noexec' in vars(event) and event.noexec:
                 task_information['task_executed'] = False
                 task_information['outcome'] = Task.OUTCOME_EMPTY
                 task_information['script_type'] = Task.CODING_NA
@@ -1776,7 +1776,7 @@ class BuildInfoHelper(object):
         image_file_extensions_unique = {}
         image_fstypes = self.server.runCommand(
             ['getVariable', 'IMAGE_FSTYPES'])[0]
-        if image_fstypes != None:
+        if image_fstypes is not None:
             image_types_str = image_fstypes.strip()
             image_file_extensions = re.sub(r' {2,}', ' ', image_types_str)
             image_file_extensions_unique = set(image_file_extensions.split(' '))
diff --git a/lib/bb/ui/knotty.py b/lib/bb/ui/knotty.py
index 19008a4..a0340df 100644
--- a/lib/bb/ui/knotty.py
+++ b/lib/bb/ui/knotty.py
@@ -447,7 +447,7 @@ def main(server, eventHandler, params, tf = TerminalFilter):
         if error:
             logger.error("Command '%s' failed: %s" % (cmdline, error))
             return 1
-        elif ret != True:
+        elif not ret:
             logger.error("Command '%s' failed: returned %s" % (cmdline, ret))
             return 1
 
diff --git a/lib/bb/ui/ncurses.py b/lib/bb/ui/ncurses.py
index 49569e3..da4fbea 100644
--- a/lib/bb/ui/ncurses.py
+++ b/lib/bb/ui/ncurses.py
@@ -238,7 +238,7 @@ class NCursesUI:
             if error:
                 print("Error running command '%s': %s" % (cmdline, error))
                 return
-            elif ret != True:
+            elif not ret:
                 print("Couldn't get default commandlind! %s" % ret)
                 return
         except xmlrpc.client.Fault as x:
diff --git a/lib/bb/ui/taskexp.py b/lib/bb/ui/taskexp.py
index 7895102..8fff244 100644
--- a/lib/bb/ui/taskexp.py
+++ b/lib/bb/ui/taskexp.py
@@ -200,7 +200,7 @@ def main(server, eventHandler, params):
         if error:
             print("Error running command '%s': %s" % (cmdline, error))
             return 1
-        elif ret != True:
+        elif not ret:
             print("Error running command '%s': returned %s" % (cmdline, ret))
             return 1
     except client.Fault as x:
diff --git a/lib/bb/ui/toasterui.py b/lib/bb/ui/toasterui.py
index 51892c9..9260f5d 100644
--- a/lib/bb/ui/toasterui.py
+++ b/lib/bb/ui/toasterui.py
@@ -176,7 +176,7 @@ def main(server, eventHandler, params):
         if error:
             logger.error("Command '%s' failed: %s" % (cmdline, error))
             return 1
-        elif ret != True:
+        elif not ret:
             logger.error("Command '%s' failed: returned %s" % (cmdline, ret))
             return 1
 
diff --git a/lib/bb/ui/uievent.py b/lib/bb/ui/uievent.py
index fedb050..13d0d4a 100644
--- a/lib/bb/ui/uievent.py
+++ b/lib/bb/ui/uievent.py
@@ -46,7 +46,7 @@ class BBUIEventQueue:
                 self.EventHandle = ret
                 error = ""
 
-            if self.EventHandle != None:
+            if self.EventHandle is not None:
                 break
 
             errmsg = "Could not register UI event handler. Error: %s, host %s, "\
diff --git a/lib/bs4/__init__.py b/lib/bs4/__init__.py
index f6fdfd5..e35725b 100644
--- a/lib/bs4/__init__.py
+++ b/lib/bs4/__init__.py
@@ -427,7 +427,7 @@ class BeautifulSoup(Tag):
         if self.is_xml:
             # Print the XML declaration
             encoding_part = ''
-            if eventual_encoding != None:
+            if eventual_encoding is not None:
                 encoding_part = ' encoding="%s"' % eventual_encoding
             prefix = '<?xml version="1.0"%s?>\n' % encoding_part
         else:
diff --git a/lib/bs4/builder/_html5lib.py b/lib/bs4/builder/_html5lib.py
index 4091ce8..9e9216e 100644
--- a/lib/bs4/builder/_html5lib.py
+++ b/lib/bs4/builder/_html5lib.py
@@ -321,7 +321,7 @@ class Element(treebuildersbase.Node):
         return self.element.contents
 
     def getNameTuple(self):
-        if self.namespace == None:
+        if self.namespace is None:
             return namespaces["html"], self.name
         else:
             return self.namespace, self.name
diff --git a/lib/ply/yacc.py b/lib/ply/yacc.py
index d50886e..561784f 100644
--- a/lib/ply/yacc.py
+++ b/lib/ply/yacc.py
@@ -488,7 +488,7 @@ class LRParser:
                     # --! DEBUG
                     return result
 
-            if t == None:
+            if t is None:
 
                 # --! DEBUG
                 debug.error('Error  : %s',
@@ -766,7 +766,7 @@ class LRParser:
                     n = symstack[-1]
                     return getattr(n,"value",None)
 
-            if t == None:
+            if t is None:
 
                 # We have some kind of parsing error here.  To handle
                 # this, we are going to push the current token onto
@@ -1021,7 +1021,7 @@ class LRParser:
                     n = symstack[-1]
                     return getattr(n,"value",None)
 
-            if t == None:
+            if t is None:
 
                 # We have some kind of parsing error here.  To handle
                 # this, we are going to push the current token onto
diff --git a/lib/prserv/db.py b/lib/prserv/db.py
index 117d8c0..cb2a246 100644
--- a/lib/prserv/db.py
+++ b/lib/prserv/db.py
@@ -71,7 +71,7 @@ class PRTable(object):
         data=self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                            (version, pkgarch, checksum))
         row=data.fetchone()
-        if row != None:
+        if row is not None:
             return row[0]
         else:
             #no value found, try to insert
@@ -87,7 +87,7 @@ class PRTable(object):
             data=self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                                (version, pkgarch, checksum))
             row=data.fetchone()
-            if row != None:
+            if row is not None:
                 return row[0]
             else:
                 raise prserv.NotFoundError
@@ -99,7 +99,7 @@ class PRTable(object):
                             % (self.table, self.table),
                             (version, pkgarch, checksum, version, pkgarch))
         row=data.fetchone()
-        if row != None:
+        if row is not None:
             return row[0]
         else:
             #no value found, try to insert
@@ -116,7 +116,7 @@ class PRTable(object):
             data=self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                                (version, pkgarch, checksum))
             row=data.fetchone()
-            if row != None:
+            if row is not None:
                 return row[0]
             else:
                 raise prserv.NotFoundError
@@ -132,7 +132,7 @@ class PRTable(object):
         data = self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                            (version, pkgarch, checksum))
         row = data.fetchone()
-        if row != None:
+        if row is not None:
             val=row[0]
         else:
             #no value found, try to insert
@@ -147,7 +147,7 @@ class PRTable(object):
             data = self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=?;" % self.table,
                            (version, pkgarch, checksum))
             row = data.fetchone()
-            if row != None:
+            if row is not None:
                 val = row[0]
         return val
 
@@ -170,7 +170,7 @@ class PRTable(object):
         data = self._execute("SELECT value FROM %s WHERE version=? AND pkgarch=? AND checksum=? AND value>=?;" % self.table,
                             (version,pkgarch,checksum,value))
         row=data.fetchone()
-        if row != None:
+        if row is not None:
             return row[0]
         else:
             return None
diff --git a/lib/pyinotify.py b/lib/pyinotify.py
index 1528a22..6ae40a2 100644
--- a/lib/pyinotify.py
+++ b/lib/pyinotify.py
@@ -1274,7 +1274,7 @@ class Notifier:
             basename = os.path.basename(sys.argv[0]) or 'pyinotify'
             pid_file = os.path.join(dirname, basename + '.pid')
 
-        if pid_file != False and os.path.lexists(pid_file):
+        if pid_file and os.path.lexists(pid_file):
             err = 'Cannot daemonize: pid file %s already exists.' % pid_file
             raise NotifierError(err)
 
@@ -1308,7 +1308,7 @@ class Notifier:
         fork_daemon()
 
         # Write pid
-        if pid_file != False:
+        if pid_file:
             flags = os.O_WRONLY|os.O_CREAT|os.O_NOFOLLOW|os.O_EXCL
             fd_pid = os.open(pid_file, flags, 0o0600)
             os.write(fd_pid,  bytes(str(os.getpid()) + '\n',
diff --git a/lib/toaster/bldcontrol/management/commands/checksettings.py b/lib/toaster/bldcontrol/management/commands/checksettings.py
index cfcd4a0..20f9dce 100644
--- a/lib/toaster/bldcontrol/management/commands/checksettings.py
+++ b/lib/toaster/bldcontrol/management/commands/checksettings.py
@@ -78,7 +78,7 @@ class Command(BaseCommand):
                         template_conf = os.environ.get("TEMPLATECONF", "")
                         custom_xml_only = os.environ.get("CUSTOM_XML_ONLY")
 
-                        if ToasterSetting.objects.filter(name='CUSTOM_XML_ONLY').count() > 0 or (not custom_xml_only == None):
+                        if ToasterSetting.objects.filter(name='CUSTOM_XML_ONLY').count() > 0 or custom_xml_only is not None:
                             # only use the custom settings
                             pass
                         elif "poky" in template_conf:
diff --git a/lib/toaster/orm/models.py b/lib/toaster/orm/models.py
index bb6b5de..caf0697 100644
--- a/lib/toaster/orm/models.py
+++ b/lib/toaster/orm/models.py
@@ -1647,14 +1647,14 @@ class CustomImageRecipe(Recipe):
         """
         # Check if we're aldready up-to-date or not
         target = self.get_last_successful_built_target()
-        if target == None:
+        if target is None:
             # So we've never actually built this Custom recipe but what about
             # the recipe it's based on?
             target = \
                 Target.objects.filter(Q(build__outcome=Build.SUCCEEDED) &
                                       Q(build__project=self.project) &
                                       Q(target=self.base_recipe.name)).last()
-            if target == None:
+            if target is None:
                 return
 
         if target.build.completed_on == self.last_updated:
diff --git a/lib/toaster/toastergui/templatetags/projecttags.py b/lib/toaster/toastergui/templatetags/projecttags.py
index 354b61f..b703da3 100644
--- a/lib/toaster/toastergui/templatetags/projecttags.py
+++ b/lib/toaster/toastergui/templatetags/projecttags.py
@@ -212,7 +212,7 @@ def filtered_installedsize(size, installed_size):
     """If package.installed_size not null and not empty return it,
        else return package.size
     """
-    return size if (installed_size == 0) or (installed_size == "") or (installed_size == None) else installed_size
+    return size if (installed_size == 0) or (installed_size == "") or (installed_size is None) else installed_size
 
 @register.filter
 def filtered_packageversion(version, revision):
@@ -228,7 +228,7 @@ def filter_sizeovertotal(package_object, total_size):
         formatted nicely.
     """
     size = package_object.installed_size
-    if size == None or size == '':
+    if size is None or size == '':
         size = package_object.size
 
     return '{:.1%}'.format(float(size)/float(total_size))
diff --git a/lib/toaster/toastergui/views.py b/lib/toaster/toastergui/views.py
index 7fecdaa..e2ead83 100644
--- a/lib/toaster/toastergui/views.py
+++ b/lib/toaster/toastergui/views.py
@@ -51,7 +51,7 @@ class MimeTypeFinder(object):
     def get_mimetype(self, path):
         guess = mimetypes.guess_type(path, self._strict)
         guessed_type = guess[0]
-        if guessed_type == None:
+        if guessed_type is None:
             guessed_type = 'application/octet-stream'
         return guessed_type
 
@@ -126,7 +126,7 @@ def _lv_to_dict(prj, x = None):
     return {"id": x.pk,
             "name": x.layer.name,
             "tooltip": "%s | %s" % (x.layer.vcs_url,x.get_vcs_reference()),
-            "detail": "(%s" % x.layer.vcs_url + (")" if x.release == None else " | "+x.get_vcs_reference()+")"),
+            "detail": "(%s" % x.layer.vcs_url + (")" if x.release is None else " | "+x.get_vcs_reference()+")"),
             "giturl": x.layer.vcs_url,
             "layerdetailurl" : reverse('layerdetails', args=(prj.id,x.pk)),
             "revision" : x.get_vcs_reference(),
@@ -718,7 +718,7 @@ def _get_dir_entries(build_id, target_id, start):
                 resolved_id = o.sym_target_id
                 resolved_path = o.path
                 if target_packages.count():
-                    while resolved_id != "" and resolved_id != None:
+                    while resolved_id != "" and resolved_id is not None:
                         tf = Target_File.objects.get(pk=resolved_id)
                         resolved_path = tf.path
                         resolved_id = tf.sym_target_id
@@ -730,10 +730,10 @@ def _get_dir_entries(build_id, target_id, start):
                         entry['package_id'] = str(p.id)
                         entry['package'] = p.name
                 # don't use resolved path from above, show immediate link-to
-                if o.sym_target_id != "" and o.sym_target_id != None:
+                if o.sym_target_id != "" and o.sym_target_id is not None:
                     entry['link_to'] = Target_File.objects.get(pk=o.sym_target_id).path
             entry['size'] = filtered_filesizeformat(o.size)
-            if entry['link_to'] != None:
+            if entry['link_to'] is not None:
                 entry['permission'] = node_str[o.inodetype] + o.permission
             else:
                 entry['permission'] = node_str[o.inodetype] + o.permission
@@ -755,7 +755,7 @@ def dirinfo(request, build_id, target_id, file_path=None):
     objects = _get_dir_entries(build_id, target_id, '/')
     packages_sum = Package.objects.filter(id__in=Target_Installed_Package.objects.filter(target_id=target_id).values('package_id')).aggregate(Sum('installed_size'))
     dir_list = None
-    if file_path != None:
+    if file_path is not None:
         """
         Link from the included package detail file list page and is
         requesting opening the dir info to a specific file path.
@@ -1029,15 +1029,15 @@ def _get_package_dependency_count(package, target_id, is_installed):
 
 def _get_package_alias(package):
     alias = package.installed_name
-    if alias != None and alias != '' and alias != package.name:
+    if alias is not None and alias != '' and alias != package.name:
         return alias
     else:
         return ''
 
 def _get_fullpackagespec(package):
     r = package.name
-    version_good = package.version != None and  package.version != ''
-    revision_good = package.revision != None and package.revision != ''
+    version_good = package.version is not None and  package.version != ''
+    revision_good = package.revision is not None and package.revision != ''
     if version_good or revision_good:
         r += '_'
         if version_good:
diff --git a/lib/toaster/toastermain/management/commands/buildimport.py b/lib/toaster/toastermain/management/commands/buildimport.py
index 9af54ec..3e246fd 100644
--- a/lib/toaster/toastermain/management/commands/buildimport.py
+++ b/lib/toaster/toastermain/management/commands/buildimport.py
@@ -505,7 +505,7 @@ class Command(BaseCommand):
         default_release = Release.objects.get(id=1)
 
         # SANITY: if 'reconfig' but project does not exist (deleted externally), switch to 'import'
-        if ("reconfigure" == options['command']) and (None == project):
+        if ("reconfigure" == options['command']) and project is None:
             options['command'] = 'import'
 
         # 'Configure':

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