python: avoid equality check for None

PEP8 says that:
"Comparisons to singletons like None should always be done with is or
is not, never the equality operators."

glib uses a mix of "== None" and "is None". This patch changes all
cases to the latter.

4 files changed, 12 insertions, 12 deletions

diff --git a/gio/gdbus-2.0/codegen/codegen.py b/gio/gdbus-2.0/codegen/codegen.py
index 307018571..e74131cdb 100644
--- a/gio/gdbus-2.0/codegen/codegen.py
+++ b/gio/gdbus-2.0/codegen/codegen.py
@@ -1068,7 +1068,7 @@ class CodeGenerator:
                            '\n')
 
     def generate_annotations(self, prefix, annotations):
-        if annotations == None:
+        if annotations is None:
             return
 
         n = 0
diff --git a/gio/gdbus-2.0/codegen/codegen_main.py b/gio/gdbus-2.0/codegen/codegen_main.py
index 10ecf7785..03de1d107 100755
--- a/gio/gdbus-2.0/codegen/codegen_main.py
+++ b/gio/gdbus-2.0/codegen/codegen_main.py
@@ -63,38 +63,38 @@ def apply_annotation(iface_list, iface, method, signal, prop, arg, key, value):
             iface_obj = i
             break
 
-    if iface_obj == None:
+    if iface_obj is None:
         print_error('No interface "{}"'.format(iface))
 
     target_obj = None
 
     if method:
         method_obj = find_method(iface_obj, method)
-        if method_obj == None:
+        if method_obj is None:
             print_error('No method "{}" on interface "{}"'.format(method, iface))
         if arg:
             arg_obj = find_arg(method_obj.in_args, arg)
-            if (arg_obj == None):
+            if (arg_obj is None):
                 arg_obj = find_arg(method_obj.out_args, arg)
-                if (arg_obj == None):
+                if (arg_obj is None):
                     print_error('No arg "{}" on method "{}" on interface "{}"'.format(arg, method, iface))
             target_obj = arg_obj
         else:
             target_obj = method_obj
     elif signal:
         signal_obj = find_signal(iface_obj, signal)
-        if signal_obj == None:
+        if signal_obj is None:
             print_error('No signal "{}" on interface "{}"'.format(signal, iface))
         if arg:
             arg_obj = find_arg(signal_obj.args, arg)
-            if (arg_obj == None):
+            if (arg_obj is None):
                 print_error('No arg "{}" on signal "{}" on interface "{}"'.format(arg, signal, iface))
             target_obj = arg_obj
         else:
             target_obj = signal_obj
     elif prop:
         prop_obj = find_prop(iface_obj, prop)
-        if prop_obj == None:
+        if prop_obj is None:
             print_error('No property "{}" on interface "{}"'.format(prop, iface))
         target_obj = prop_obj
     else:
diff --git a/gio/gdbus-2.0/codegen/dbustypes.py b/gio/gdbus-2.0/codegen/dbustypes.py
index 2b721bfbf..2ff736a5e 100644
--- a/gio/gdbus-2.0/codegen/dbustypes.py
+++ b/gio/gdbus-2.0/codegen/dbustypes.py
@@ -61,7 +61,7 @@ class Arg:
         if len(self.since) == 0:
             self.since = utils.lookup_since(self.annotations)
 
-        if self.name == None:
+        if self.name is None:
             self.name = 'unnamed_arg%d'%arg_number
         # default to GVariant
         self.ctype_in_g  = 'GVariant *'
diff --git a/gio/gdbus-2.0/codegen/utils.py b/gio/gdbus-2.0/codegen/utils.py
index bdfa703ac..95ba107d3 100644
--- a/gio/gdbus-2.0/codegen/utils.py
+++ b/gio/gdbus-2.0/codegen/utils.py
@@ -116,21 +116,21 @@ def lookup_annotation(annotations, key):
 
 def lookup_docs(annotations):
     s = lookup_annotation(annotations, 'org.gtk.GDBus.DocString')
-    if s == None:
+    if s is None:
         return ''
     else:
         return s
 
 def lookup_since(annotations):
     s = lookup_annotation(annotations, 'org.gtk.GDBus.Since')
-    if s == None:
+    if s is None:
         return ''
     else:
         return s
 
 def lookup_brief_docs(annotations):
     s = lookup_annotation(annotations, 'org.gtk.GDBus.DocString.Short')
-    if s == None:
+    if s is None:
         return ''
     else:
         return s