#28795: Utilize dict.setdefault()
------------------------------------------------+------------------------
Reporter: Дилян Палаузов | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: Uncategorized | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
------------------------------------------------+------------------------
{{{
diff --git a/django/contrib/gis/apps.py b/django/contrib/gis/apps.py
--- a/django/contrib/gis/apps.py
+++ b/django/contrib/gis/apps.py
@@ -8,5 +8,4 @@ class GISConfig(AppConfig):
verbose_name = _("GIS")
def ready(self):
- if 'geojson' not in serializers.BUILTIN_SERIALIZERS:
- serializers.BUILTIN_SERIALIZERS['geojson'] =
"django.contrib.gis.serializers.geojson"
+ serializers.BUILTIN_SERIALIZERS.setdefault('geojson',
"django.contrib.gis.serializers.geojson")
diff --git a/django/contrib/gis/db/models/fields.py
b/django/contrib/gis/db/models/fields.py
--- a/django/contrib/gis/db/models/fields.py
+++ b/django/contrib/gis/db/models/fields.py
@@ -255,9 +255,9 @@ class GeometryField(BaseSpatialField):
'srid': self.srid,
}
defaults.update(kwargs)
- if (self.dim > 2 and 'widget' not in kwargs and
+ if (self.dim > 2 and
not getattr(defaults['form_class'].widget, 'supports_3d',
False)):
- defaults['widget'] = forms.Textarea
+ defaults.setdefault('widget', forms.Textarea)
return super().formfield(**defaults)
def select_format(self, compiler, sql, params):
diff --git a/django/contrib/gis/gdal/raster/source.py
b/django/contrib/gis/gdal/raster/source.py
--- a/django/contrib/gis/gdal/raster/source.py
+++ b/django/contrib/gis/gdal/raster/source.py
@@ -381,27 +381,14 @@ class GDALRaster(GDALRasterBase):
consult the GDAL_RESAMPLE_ALGORITHMS constant.
"""
# Get the parameters defining the geotransform, srid, and size of
the raster
- if 'width' not in ds_input:
- ds_input['width'] = self.width
-
- if 'height' not in ds_input:
- ds_input['height'] = self.height
-
- if 'srid' not in ds_input:
- ds_input['srid'] = self.srs.srid
-
- if 'origin' not in ds_input:
- ds_input['origin'] = self.origin
-
- if 'scale' not in ds_input:
- ds_input['scale'] = self.scale
-
- if 'skew' not in ds_input:
- ds_input['skew'] = self.skew
-
+ ds_input.setdefault('width', self.width)
+ ds_input.setdefault('height', self.height)
+ ds_input.setdefault('srid', self.srs.srid)
+ ds_input.setdefault('origin', self.origin)
+ ds_input.setdefault('scale', self.scale)
+ ds_input.setdefault('skew', self.skew)
# Get the driver, name, and datatype of the target raster
- if 'driver' not in ds_input:
- ds_input['driver'] = self.driver.name
+ ds_input.setdefault('driver', self.driver.name)
if 'name' not in ds_input:
ds_input['name'] = self.name + '_copy.' + self.driver.name
diff --git a/django/db/migrations/operations/models.py
b/django/db/migrations/operations/models.py
--- a/django/db/migrations/operations/models.py
+++ b/django/db/migrations/operations/models.py
@@ -693,8 +693,8 @@ class AlterModelOptions(ModelOptionOperation):
model_state.options = dict(model_state.options)
model_state.options.update(self.options)
for key in self.ALTER_OPTION_KEYS:
- if key not in self.options and key in model_state.options:
- del model_state.options[key]
+ if key not in self.options:
+ model_state.options.pop(key, False)
state.reload_model(app_label, self.name_lower, delay=True)
def database_forwards(self, app_label, schema_editor, from_state,
to_state):
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -692,8 +692,7 @@ class Query:
# in the parent list. Again, it must be mentioned to ensure
that
# only "must include" fields are pulled in.
for model in orig_opts.get_parent_list():
- if model not in seen:
- seen[model] = set()
+ seen.setdefault(model, set())
for model, values in seen.items():
callback(target, model, values)
diff --git a/django/forms/boundfield.py b/django/forms/boundfield.py
--- a/django/forms/boundfield.py
+++ b/django/forms/boundfield.py
@@ -88,11 +88,11 @@ class BoundField:
attrs = attrs or {}
attrs = self.build_widget_attrs(attrs, widget)
auto_id = self.auto_id
- if auto_id and 'id' not in attrs and 'id' not in widget.attrs:
+ if auto_id and 'id' not in widget.attrs:
if not only_initial:
- attrs['id'] = auto_id
+ attrs.setdefault('id', auto_id)
else:
- attrs['id'] = self.html_initial_id
+ attrs.setdefault('id', self.html_initial_id)
if not only_initial:
name = self.html_name
diff --git a/django/http/response.py b/django/http/response.py
--- a/django/http/response.py
+++ b/django/http/response.py
@@ -136,10 +136,7 @@ class HttpResponseBase:
self._headers[header.lower()] = (header, value)
def __delitem__(self, header):
- try:
- del self._headers[header.lower()]
- except KeyError:
- pass
+ self._headers.pop(header.lower(), False)
def __getitem__(self, header):
return self._headers[header.lower()][1]
diff --git a/django/middleware/locale.py b/django/middleware/locale.py
--- a/django/middleware/locale.py
+++ b/django/middleware/locale.py
@@ -57,6 +57,5 @@ class LocaleMiddleware(MiddlewareMixin):
if not (i18n_patterns_used and language_from_path):
patch_vary_headers(response, ('Accept-Language',))
- if 'Content-Language' not in response:
- response['Content-Language'] = language
+ response.setdefault('Content-Language', language)
return response
diff --git a/django/middleware/security.py b/django/middleware/security.py
--- a/django/middleware/security.py
+++ b/django/middleware/security.py
@@ -37,10 +37,10 @@ class SecurityMiddleware(MiddlewareMixin):
sts_header = sts_header + "; preload"
response["strict-transport-security"] = sts_header
- if self.content_type_nosniff and 'x-content-type-options' not in
response:
- response["x-content-type-options"] = "nosniff"
+ if self.content_type_nosniff:
+ response.setdefault("x-content-type-options", "nosniff")
- if self.xss_filter and 'x-xss-protection' not in response:
- response["x-xss-protection"] = "1; mode=block"
+ if self.xss_filter:
+ response.setdefault("x-xss-protection", "1; mode=block")
return response
diff --git a/django/template/defaulttags.py
b/django/template/defaulttags.py
--- a/django/template/defaulttags.py
+++ b/django/template/defaulttags.py
@@ -225,8 +225,7 @@ class IfChangedNode(Node):
def render(self, context):
# Init state storage
state_frame = self._get_context_stack_frame(context)
- if self not in state_frame:
- state_frame[self] = None
+ state_frame.setdefault(self)
nodelist_true_output = None
if self._varlist:
diff --git a/django/views/decorators/http.py
b/django/views/decorators/http.py
--- a/django/views/decorators/http.py
+++ b/django/views/decorators/http.py
@@ -103,8 +103,8 @@ def condition(etag_func=None,
last_modified_func=None):
if request.method in ('GET', 'HEAD'):
if res_last_modified and not response.has_header('Last-
Modified'):
response['Last-Modified'] =
http_date(res_last_modified)
- if res_etag and not response.has_header('ETag'):
- response['ETag'] = res_etag
+ if res_etag:
+ response.setdefault('ETag', res_etag)
return response
diff --git a/django/views/generic/base.py b/django/views/generic/base.py
--- a/django/views/generic/base.py
+++ b/django/views/generic/base.py
@@ -21,8 +21,7 @@ class ContextMixin:
extra_context = None
def get_context_data(self, **kwargs):
- if 'view' not in kwargs:
- kwargs['view'] = self
+ kwargs.setdefault('view', self)
if self.extra_context is not None:
kwargs.update(self.extra_context)
return kwargs
diff --git a/tests/runtests.py b/tests/runtests.py
--- a/tests/runtests.py
+++ b/tests/runtests.py
@@ -455,8 +455,7 @@ if __name__ == "__main__":
if options.settings:
os.environ['DJANGO_SETTINGS_MODULE'] = options.settings
else:
- if "DJANGO_SETTINGS_MODULE" not in os.environ:
- os.environ['DJANGO_SETTINGS_MODULE'] = 'test_sqlite'
+ os.environ.setdefault("DJANGO_SETTINGS_MODULE", 'test_sqlite')
options.settings = os.environ['DJANGO_SETTINGS_MODULE']
if options.selenium:
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/28795>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
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