fix flake8 standard problems

account/views/admin.py

@@ -151,7 +151,7 @@ class GenerateUserAPI(APIView):
             raw_data = f.read()
         os.remove(file_path)
         response = HttpResponse(raw_data)
-        response["Content-Disposition"] = f"attachment; filename=users.xlsx"
+        response["Content-Disposition"] = "attachment; filename=users.xlsx"
         response["Content-Type"] = "application/xlsx"
         return response
 

account/views/oj.py

@@ -305,7 +305,7 @@ class ApplyResetPasswordAPI(APIView):
         send_email_async.send(from_name=SysOptions.website_name_shortcut,
                               to_email=user.email,
                               to_name=user.username,
-                              subject=f"Reset your password",
+                              subject="Reset your password",
                               content=email_html)
         return self.success("Succeeded")
 

conf/tests.py

@@ -71,7 +71,7 @@ class WebsiteConfigAPITest(APITestCase):
                 "allow_register": True, "submission_list_show_all": False}
         resp = self.client.post(url, data=data)
         self.assertSuccess(resp)
-        self.assertEqual(SysOptions.website_footer, "<img src=\"#\" />")
+        self.assertEqual(SysOptions.website_footer, '<img src=\"#\" />')
 
     def test_get_website_config(self):
         # do not need to login

problem/views/admin.py

@@ -542,7 +542,7 @@ class ExportProblemAPI(APIView):
         delete_files.send_with_options(args=(path,), delay=300_000)
         resp = FileResponse(open(path, "rb"))
         resp["Content-Type"] = "application/zip"
-        resp["Content-Disposition"] = f"attachment;filename=problem-export.zip"
+        resp["Content-Disposition"] = "attachment;filename=problem-export.zip"
         return resp
 
 

run_test.py

@@ -21,7 +21,7 @@ print("running flake8...")
 if os.system("flake8 --statistics ."):
     exit()
 
-ret = os.system("coverage run --include=\"$PWD/*\" manage.py test {module} --settings={setting}".format(module=test_module, setting=setting))
+ret = os.system('coverage run --include=\"$PWD/*\" manage.py test {module} --settings={setting}'.format(module=test_module, setting=setting))
 
 if not ret and is_coverage:
     os.system("coverage html && open htmlcov/index.html")

utils/management/commands/inituser.py

@@ -36,7 +36,7 @@ class Command(BaseCommand):
                 user = User.objects.get(username=username)
                 user.set_password(password)
                 user.save()
-                self.stdout.write(self.style.SUCCESS(f"Password is rested"))
+                self.stdout.write(self.style.SUCCESS("Password is rested"))
             except User.DoesNotExist:
                 self.stdout.write(self.style.ERROR(f"User {username} doesnot exist, operation ignored"))
                 exit(1)