Fixed #20989 -- Removed useless explicit list comprehensions.

5 files changed, 10 insertions, 10 deletions

diff --git a/tests/forms_tests/tests/test_error_messages.py b/tests/forms_tests/tests/test_error_messages.py
index f0638298e9..2b1bec1647 100644
--- a/tests/forms_tests/tests/test_error_messages.py
+++ b/tests/forms_tests/tests/test_error_messages.py
@@ -221,7 +221,7 @@ class FormsErrorMessagesTestCase(TestCase, AssertFormErrorsMixin):
 
             def as_divs(self):
                 if not self: return ''
-                return mark_safe('<div class="error">%s</div>' % ''.join(['<p>%s</p>' % e for e in self]))
+                return mark_safe('<div class="error">%s</div>' % ''.join('<p>%s</p>' % e for e in self))
 
         # This form should print errors the default way.
         form1 = TestForm({'first_name': 'John'})
diff --git a/tests/forms_tests/tests/test_extra.py b/tests/forms_tests/tests/test_extra.py
index b86245ab73..21186682d5 100644
--- a/tests/forms_tests/tests/test_extra.py
+++ b/tests/forms_tests/tests/test_extra.py
@@ -723,7 +723,7 @@ class FormsExtraTestCase(TestCase, AssertFormErrorsMixin):
 
             def as_divs(self):
                 if not self: return ''
-                return '<div class="errorlist">%s</div>' % ''.join(['<div class="error">%s</div>' % force_text(e) for e in self])
+                return '<div class="errorlist">%s</div>' % ''.join('<div class="error">%s</div>' % force_text(e) for e in self)
 
         class CommentForm(Form):
             name = CharField(max_length=50, required=False)
diff --git a/tests/forms_tests/tests/test_forms.py b/tests/forms_tests/tests/test_forms.py
index 1c72d17abe..06ee3212a9 100644
--- a/tests/forms_tests/tests/test_forms.py
+++ b/tests/forms_tests/tests/test_forms.py
@@ -437,11 +437,11 @@ class FormsTestCase(TestCase):
             name = ChoiceField(choices=[('john', 'John'), ('paul', 'Paul'), ('george', 'George'), ('ringo', 'Ringo')], widget=RadioSelect)
 
         f = BeatleForm(auto_id=False)
-        self.assertHTMLEqual('\n'.join([str(bf) for bf in f['name']]), """<label><input type="radio" name="name" value="john" /> John</label>
+        self.assertHTMLEqual('\n'.join(str(bf) for bf in f['name']), """<label><input type="radio" name="name" value="john" /> John</label>
 <label><input type="radio" name="name" value="paul" /> Paul</label>
 <label><input type="radio" name="name" value="george" /> George</label>
 <label><input type="radio" name="name" value="ringo" /> Ringo</label>""")
-        self.assertHTMLEqual('\n'.join(['<div>%s</div>' % bf for bf in f['name']]), """<div><label><input type="radio" name="name" value="john" /> John</label></div>
+        self.assertHTMLEqual('\n'.join('<div>%s</div>' % bf for bf in f['name']), """<div><label><input type="radio" name="name" value="john" /> John</label></div>
 <div><label><input type="radio" name="name" value="paul" /> Paul</label></div>
 <div><label><input type="radio" name="name" value="george" /> George</label></div>
 <div><label><input type="radio" name="name" value="ringo" /> Ringo</label></div>""")
@@ -452,7 +452,7 @@ class FormsTestCase(TestCase):
             name = CharField()
 
         f = BeatleForm(auto_id=False)
-        self.assertHTMLEqual('\n'.join([str(bf) for bf in f['name']]), '<input type="text" name="name" />')
+        self.assertHTMLEqual('\n'.join(str(bf) for bf in f['name']), '<input type="text" name="name" />')
 
     def test_forms_with_multiple_choice(self):
         # MultipleChoiceField is a special case, as its data is required to be a list:
diff --git a/tests/forms_tests/tests/test_formsets.py b/tests/forms_tests/tests/test_formsets.py
index 41577e6049..6372f2a8f4 100644
--- a/tests/forms_tests/tests/test_formsets.py
+++ b/tests/forms_tests/tests/test_formsets.py
@@ -900,7 +900,7 @@ class FormsFormsetTestCase(TestCase):
         }
         formset = AnotherChoiceFormSet(data, auto_id=False, prefix='choices')
         self.assertTrue(formset.is_valid())
-        self.assertTrue(all([form.is_valid_called for form in formset.forms]))
+        self.assertTrue(all(form.is_valid_called for form in formset.forms))
 
     def test_hard_limit_on_instantiated_forms(self):
         """A formset has a hard limit on the number of forms instantiated."""
diff --git a/tests/forms_tests/tests/test_widgets.py b/tests/forms_tests/tests/test_widgets.py
index 3f11771d7a..7f23b1a8b5 100644
--- a/tests/forms_tests/tests/test_widgets.py
+++ b/tests/forms_tests/tests/test_widgets.py
@@ -640,7 +640,7 @@ beatle J R Ringo False""")
         # You can create your own custom renderers for RadioSelect to use.
         class MyRenderer(RadioFieldRenderer):
            def render(self):
-               return '<br />\n'.join([six.text_type(choice) for choice in self])
+               return '<br />\n'.join(six.text_type(choice) for choice in self)
         w = RadioSelect(renderer=MyRenderer)
         self.assertHTMLEqual(w.render('beatle', 'G', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo'))), """<label><input type="radio" name="beatle" value="J" /> John</label><br />
 <label><input type="radio" name="beatle" value="P" /> Paul</label><br />
@@ -835,17 +835,17 @@ beatle J R Ringo False""")
 
     def test_subwidget(self):
         # Each subwidget tag gets a separate ID when the widget has an ID specified
-        self.assertHTMLEqual("\n".join([c.tag() for c in CheckboxSelectMultiple(attrs={'id': 'abc'}).subwidgets('letters', list('ac'), choices=zip(list('abc'), list('ABC')))]), """<input checked="checked" type="checkbox" name="letters" value="a" id="abc_0" />
+        self.assertHTMLEqual("\n".join(c.tag() for c in CheckboxSelectMultiple(attrs={'id': 'abc'}).subwidgets('letters', list('ac'), choices=zip(list('abc'), list('ABC')))), """<input checked="checked" type="checkbox" name="letters" value="a" id="abc_0" />
 <input type="checkbox" name="letters" value="b" id="abc_1" />
 <input checked="checked" type="checkbox" name="letters" value="c" id="abc_2" />""")
 
         # Each subwidget tag does not get an ID if the widget does not have an ID specified
-        self.assertHTMLEqual("\n".join([c.tag() for c in CheckboxSelectMultiple().subwidgets('letters', list('ac'), choices=zip(list('abc'), list('ABC')))]), """<input checked="checked" type="checkbox" name="letters" value="a" />
+        self.assertHTMLEqual("\n".join(c.tag() for c in CheckboxSelectMultiple().subwidgets('letters', list('ac'), choices=zip(list('abc'), list('ABC')))), """<input checked="checked" type="checkbox" name="letters" value="a" />
 <input type="checkbox" name="letters" value="b" />
 <input checked="checked" type="checkbox" name="letters" value="c" />""")
 
         # The id_for_label property of the subwidget should return the ID that is used on the subwidget's tag
-        self.assertHTMLEqual("\n".join(['<input type="checkbox" name="letters" value="%s" id="%s" />' % (c.choice_value, c.id_for_label) for c in CheckboxSelectMultiple(attrs={'id': 'abc'}).subwidgets('letters', [], choices=zip(list('abc'), list('ABC')))]), """<input type="checkbox" name="letters" value="a" id="abc_0" />
+        self.assertHTMLEqual("\n".join('<input type="checkbox" name="letters" value="%s" id="%s" />' % (c.choice_value, c.id_for_label) for c in CheckboxSelectMultiple(attrs={'id': 'abc'}).subwidgets('letters', [], choices=zip(list('abc'), list('ABC')))), """<input type="checkbox" name="letters" value="a" id="abc_0" />
 <input type="checkbox" name="letters" value="b" id="abc_1" />
 <input type="checkbox" name="letters" value="c" id="abc_2" />""")