测试gitnore

venv/Lib/site-packages/django/db/transaction.py

@@ -1,17 +1,12 @@
 from contextlib import ContextDecorator, contextmanager
 
 from django.db import (
-    DEFAULT_DB_ALIAS,
-    DatabaseError,
-    Error,
-    ProgrammingError,
-    connections,
+    DEFAULT_DB_ALIAS, DatabaseError, Error, ProgrammingError, connections,
 )
 
 
 class TransactionManagementError(ProgrammingError):
     """Transaction management is used improperly."""
-
     pass
 
 
@@ -137,7 +132,6 @@ def on_commit(func, using=None):
 # Decorators / context managers #
 #################################
 
-
 class Atomic(ContextDecorator):
     """
     Guarantee the atomic execution of a given block.
@@ -171,7 +165,6 @@ class Atomic(ContextDecorator):
 
     This is a private API.
     """
-
     # This private flag is provided only to disable the durability checks in
     # TestCase.
     _ensure_durability = True
@@ -186,8 +179,8 @@ class Atomic(ContextDecorator):
 
         if self.durable and self._ensure_durability and connection.in_atomic_block:
             raise RuntimeError(
-                "A durable atomic block cannot be nested within another "
-                "atomic block."
+                'A durable atomic block cannot be nested within another '
+                'atomic block.'
             )
         if not connection.in_atomic_block:
             # Reset state when entering an outermost atomic block.
@@ -211,9 +204,7 @@ class Atomic(ContextDecorator):
             else:
                 connection.savepoint_ids.append(None)
         else:
-            connection.set_autocommit(
-                False, force_begin_transaction_with_broken_autocommit=True
-            )
+            connection.set_autocommit(False, force_begin_transaction_with_broken_autocommit=True)
             connection.in_atomic_block = True
 
     def __exit__(self, exc_type, exc_value, traceback):