fixed lint

Author: daniel-sanche

google/cloud/bigtable/data/_async/_mutate_rows.py

@@ -22,7 +22,6 @@
 import google.cloud.bigtable.data.exceptions as bt_exceptions
 from google.cloud.bigtable.data._helpers import _attempt_timeout_generator
 from google.cloud.bigtable.data._helpers import _retry_exception_factory
-from google.cloud.bigtable.data._helpers import TrackedBackoffGenerator
 
 # mutate_rows requests are limited to this number of mutations
 from google.cloud.bigtable.data.mutations import _MUTATE_ROWS_REQUEST_MUTATION_LIMIT

google/cloud/bigtable/data/_async/_read_rows.py

@@ -31,7 +31,6 @@
 from google.cloud.bigtable.data.exceptions import _ResetRow
 from google.cloud.bigtable.data._helpers import _attempt_timeout_generator
 from google.cloud.bigtable.data._helpers import _retry_exception_factory
-from google.cloud.bigtable.data._helpers import TrackedBackoffGenerator
 
 from google.api_core import retry as retries
 

google/cloud/bigtable/data/_async/client.py

@@ -78,7 +78,6 @@
 from google.cloud.bigtable.data._helpers import _get_retryable_errors
 from google.cloud.bigtable.data._helpers import _get_timeouts
 from google.cloud.bigtable.data._helpers import _attempt_timeout_generator
-from google.cloud.bigtable.data._helpers import TrackedBackoffGenerator
 from google.cloud.bigtable.data.mutations import Mutation, RowMutationEntry
 
 from google.cloud.bigtable.data.read_modify_write_rules import ReadModifyWriteRule

google/cloud/bigtable/data/_metrics/data_model.py

@@ -146,7 +146,9 @@ class ActiveOperationMetric:
     uuid: str = field(default_factory=lambda: str(uuid.uuid4()))
     # create a default backoff generator, initialized with standard default backoff values
     backoff_generator: TrackedBackoffGenerator = field(
-        default_factory=lambda: TrackedBackoffGenerator(initial=0.01, maximum=60, multiplier=2)
+        default_factory=lambda: TrackedBackoffGenerator(
+            initial=0.01, maximum=60, multiplier=2
+        )
     )
     # keep monotonic timestamps for active operations
     start_time_ns: int = field(default_factory=time.monotonic_ns)
@@ -204,9 +206,7 @@ def start_attempt(self) -> ActiveAttemptMetric:
         try:
             # find backoff value before this attempt
             prev_attempt_idx = len(self.completed_attempts) - 1
-            backoff = self.backoff_generator.get_attempt_backoff(
-                prev_attempt_idx
-            )
+            backoff = self.backoff_generator.get_attempt_backoff(prev_attempt_idx)
             # generator will return the backoff time in seconds, so convert to nanoseconds
             backoff_ns = int(backoff * 1e9)
         except IndexError: