.

Author: iamsusiep

cirq-core/cirq/protocols/kraus_protocol_test.py

@@ -212,7 +212,8 @@ def _apply_channel_(self, args: cirq.ApplyChannelArgs):
 
 
 def test_reset_channel_kraus_apply_channel_consistency():
-    """Test that ResetChannel's _kraus_ and _apply_channel_ produce the same channel, even if one is missing."""
+    """Test that ResetChannel's _kraus_ and _apply_channel_ produce the same channel,
+    even if one is missing."""
     Reset = cirq.ResetChannel
     # Original gate
     gate = Reset()

cirq-core/cirq/qis/channels_test.py

@@ -16,7 +16,7 @@
 
 from __future__ import annotations
 
-from typing import Iterable, Sequence
+from typing import Iterable
 
 import numpy as np
 import pytest

cirq-core/cirq/testing/circuit_compare.py

@@ -494,8 +494,7 @@ def assert_has_consistent_qid_shape(val: Any) -> None:
 
 
 def apply_kraus_operators(kraus_operators: Sequence[np.ndarray], rho: np.ndarray) -> np.ndarray:
-    """
-    Applies a quantum channel (in Kraus operator form) to a density matrix.
+    """Applies a quantum channel (in Kraus operator form) to a density matrix.
 
     Args:
         kraus_operators: Sequence of Kraus operators specifying the channel.