tree-wide: use proper 'not in' notation

Let's be more pythonic and 'not is' seems really weird.

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>

2 files changed, 3 insertions, 3 deletions

diff --git a/mesonbuild/modules/gnome.py b/mesonbuild/modules/gnome.py
index 3a991e9..b093dd5 100644
--- a/mesonbuild/modules/gnome.py
+++ b/mesonbuild/modules/gnome.py
@@ -639,7 +639,7 @@ can not be used with the current version of glib-compiled-resources, due to
         modulename = args[0]
         if not isinstance(modulename, str):
             raise MesonException('Gtkdoc arg must be string.')
-        if not 'src_dir' in kwargs:
+        if 'src_dir' not in kwargs:
             raise MesonException('Keyword argument src_dir missing.')
         main_file = kwargs.get('main_sgml', '')
         if not isinstance(main_file, str):
@@ -657,7 +657,7 @@ can not be used with the current version of glib-compiled-resources, due to
         namespace = kwargs.get('namespace', '')
         mode = kwargs.get('mode', 'auto')
         VALID_MODES = ('xml', 'sgml', 'none', 'auto')
-        if not mode in VALID_MODES:
+        if mode not in VALID_MODES:
             raise MesonException('gtkdoc: Mode {} is not a valid mode: {}'.format(mode, VALID_MODES))
 
         src_dirs = kwargs['src_dir']
diff --git a/mesonbuild/modules/i18n.py b/mesonbuild/modules/i18n.py
index eaeb0a3..a161545 100644
--- a/mesonbuild/modules/i18n.py
+++ b/mesonbuild/modules/i18n.py
@@ -53,7 +53,7 @@ class I18nModule:
 
         file_type = kwargs.pop('type', 'xml')
         VALID_TYPES = ('xml', 'desktop')
-        if not file_type in VALID_TYPES:
+        if file_type not in VALID_TYPES:
             raise MesonException('i18n: "{}" is not a valid type {}'.format(file_type, VALID_TYPES))
 
         kwargs['command'] = ['msgfmt', '--' + file_type,