Replaced temporary lists used for passing arguments with iterables.

2 files changed, 5 insertions, 2 deletions

diff --git a/django/core/checks/registry.py b/django/core/checks/registry.py
index 581783ad0b..4f7a9618c8 100644
--- a/django/core/checks/registry.py
+++ b/django/core/checks/registry.py
@@ -86,7 +86,10 @@ class CheckRegistry:
         return tag in self.tags_available(include_deployment_checks)
 
     def tags_available(self, deployment_checks=False):
-        return set(chain(*[check.tags for check in self.get_checks(deployment_checks) if hasattr(check, 'tags')]))
+        return set(chain.from_iterable(
+            check.tags for check in self.get_checks(deployment_checks)
+            if hasattr(check, 'tags')
+        ))
 
     def get_checks(self, include_deployment_checks=False):
         checks = list(self.registered_checks)
diff --git a/django/core/management/commands/makemigrations.py b/django/core/management/commands/makemigrations.py
index a648062565..013b6035b7 100644
--- a/django/core/management/commands/makemigrations.py
+++ b/django/core/management/commands/makemigrations.py
@@ -244,7 +244,7 @@ class Command(BaseCommand):
             def all_items_equal(seq):
                 return all(item == seq[0] for item in seq[1:])
 
-            merge_migrations_generations = zip(*[m.ancestry for m in merge_migrations])
+            merge_migrations_generations = zip(*(m.ancestry for m in merge_migrations))
             common_ancestor_count = sum(1 for common_ancestor_generation
                                         in takewhile(all_items_equal, merge_migrations_generations))
             if not common_ancestor_count: