Apply PEP-563 (Postponed Evaluation of Annotations) to non-core airfl…

…ow (apache#26289)

This PR applies PEP-563 to all non-core airflow Python files - i.e.
those that we usually do not cherry-pick to v2-* branches. There
will be a follow-up to apply the "core changes" right after with
the intention to be cherry-picked to v2-* branch before 2.4.0
release candidate is ready, in order to make cherry-picking
easier.

This PR is a result of combining some of the 47 PRs reviewed
and approved separately (otherwise it would have been unreviewable)

The history of those PRs can be changed in:
https://github.com/apache/airflow/pulls?q=is%3Apr+label%3Afuture-annotations+is%3Aopen

Relevant discussion: https://lists.apache.org/thread/81fr042s5d3v17v83bpo24tnrr2pp0fp
Lazy consensus call: https://lists.apache.org/thread/l74nvjh8tgbtojllhwkcn7f8mfnlz4jq

.pre-commit-config.yaml

@@ -213,7 +213,9 @@ repos:
       - id: pyupgrade
         name: Upgrade Python code automatically
         args: ["--py37-plus"]
-        exclude: ^airflow/_vendor/
+        # We need to exclude gcs hook from pyupgrade because it has public "list" command which clashes
+        # with `list` that is used as type
+        exclude: ^airflow/_vendor/|^airflow/providers/google/cloud/hooks/gcs.py$
   - repo: https://github.com/pre-commit/pygrep-hooks
     rev: v1.9.0
     hooks:

airflow/providers/airbyte/hooks/airbyte.py

@@ -15,8 +15,10 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+from __future__ import annotations
+
 import time
-from typing import Any, Optional, Union
+from typing import Any
 
 from airflow.exceptions import AirflowException
 from airflow.providers.http.hooks.http import HttpHook
@@ -48,9 +50,7 @@ def __init__(self, airbyte_conn_id: str = "airbyte_default", api_version: str =
         super().__init__(http_conn_id=airbyte_conn_id)
         self.api_version: str = api_version
 
-    def wait_for_job(
-        self, job_id: Union[str, int], wait_seconds: float = 3, timeout: Optional[float] = 3600
-    ) -> None:
+    def wait_for_job(self, job_id: str | int, wait_seconds: float = 3, timeout: float | None = 3600) -> None:
         """
         Helper method which polls a job to check if it finishes.
 

airflow/providers/airbyte/operators/airbyte.py

@@ -15,7 +15,9 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-from typing import TYPE_CHECKING, Optional, Sequence
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Sequence
 
 from airflow.models import BaseOperator
 from airflow.providers.airbyte.hooks.airbyte import AirbyteHook
@@ -51,10 +53,10 @@ def __init__(
         self,
         connection_id: str,
         airbyte_conn_id: str = "airbyte_default",
-        asynchronous: Optional[bool] = False,
+        asynchronous: bool | None = False,
         api_version: str = "v1",
         wait_seconds: float = 3,
-        timeout: Optional[float] = 3600,
+        timeout: float | None = 3600,
         **kwargs,
     ) -> None:
         super().__init__(**kwargs)
@@ -65,7 +67,7 @@ def __init__(
         self.wait_seconds = wait_seconds
         self.asynchronous = asynchronous
 
-    def execute(self, context: 'Context') -> None:
+    def execute(self, context: Context) -> None:
         """Create Airbyte Job and wait to finish"""
         self.hook = AirbyteHook(airbyte_conn_id=self.airbyte_conn_id, api_version=self.api_version)
         job_object = self.hook.submit_sync_connection(connection_id=self.connection_id)

airflow/providers/airbyte/sensors/airbyte.py

@@ -16,6 +16,8 @@
 # specific language governing permissions and limitations
 # under the License.
 """This module contains a Airbyte Job sensor."""
+from __future__ import annotations
+
 from typing import TYPE_CHECKING, Sequence
 
 from airflow.exceptions import AirflowException
@@ -52,7 +54,7 @@ def __init__(
         self.airbyte_job_id = airbyte_job_id
         self.api_version = api_version
 
-    def poke(self, context: 'Context') -> bool:
+    def poke(self, context: Context) -> bool:
         hook = AirbyteHook(airbyte_conn_id=self.airbyte_conn_id, api_version=self.api_version)
         job = hook.get_job(job_id=self.airbyte_job_id)
         status = job.json()['job']['status']

airflow/providers/alibaba/cloud/hooks/oss.py

@@ -15,9 +15,11 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+from __future__ import annotations
+
 from functools import wraps
 from inspect import signature
-from typing import TYPE_CHECKING, Callable, Optional, TypeVar, cast
+from typing import TYPE_CHECKING, Callable, TypeVar, cast
 from urllib.parse import urlparse
 
 import oss2
@@ -88,13 +90,13 @@ class OSSHook(BaseHook):
     conn_type = 'oss'
     hook_name = 'OSS'
 
-    def __init__(self, region: Optional[str] = None, oss_conn_id='oss_default', *args, **kwargs) -> None:
+    def __init__(self, region: str | None = None, oss_conn_id='oss_default', *args, **kwargs) -> None:
         self.oss_conn_id = oss_conn_id
         self.oss_conn = self.get_connection(oss_conn_id)
         self.region = self.get_default_region() if region is None else region
         super().__init__(*args, **kwargs)
 
-    def get_conn(self) -> "Connection":
+    def get_conn(self) -> Connection:
         """Returns connection for the hook."""
         return self.oss_conn
 
@@ -118,7 +120,7 @@ def parse_oss_url(ossurl: str) -> tuple:
 
     @provide_bucket_name
     @unify_bucket_name_and_key
-    def object_exists(self, key: str, bucket_name: Optional[str] = None) -> bool:
+    def object_exists(self, key: str, bucket_name: str | None = None) -> bool:
         """
         Check if object exists.
 
@@ -134,7 +136,7 @@ def object_exists(self, key: str, bucket_name: Optional[str] = None) -> bool:
             return False
 
     @provide_bucket_name
-    def get_bucket(self, bucket_name: Optional[str] = None) -> oss2.api.Bucket:
+    def get_bucket(self, bucket_name: str | None = None) -> oss2.api.Bucket:
         """
         Returns a oss2.Bucket object
 
@@ -148,7 +150,7 @@ def get_bucket(self, bucket_name: Optional[str] = None) -> oss2.api.Bucket:
 
     @provide_bucket_name
     @unify_bucket_name_and_key
-    def load_string(self, key: str, content: str, bucket_name: Optional[str] = None) -> None:
+    def load_string(self, key: str, content: str, bucket_name: str | None = None) -> None:
         """
         Loads a string to OSS
 
@@ -167,7 +169,7 @@ def upload_local_file(
         self,
         key: str,
         file: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
     ) -> None:
         """
         Upload a local file to OSS
@@ -187,8 +189,8 @@ def download_file(
         self,
         key: str,
         local_file: str,
-        bucket_name: Optional[str] = None,
-    ) -> Optional[str]:
+        bucket_name: str | None = None,
+    ) -> str | None:
         """
         Download file from OSS
 
@@ -210,7 +212,7 @@ def download_file(
     def delete_object(
         self,
         key: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
     ) -> None:
         """
         Delete object from OSS
@@ -229,7 +231,7 @@ def delete_object(
     def delete_objects(
         self,
         key: list,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
     ) -> None:
         """
         Delete objects from OSS
@@ -246,7 +248,7 @@ def delete_objects(
     @provide_bucket_name
     def delete_bucket(
         self,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
     ) -> None:
         """
         Delete bucket from OSS
@@ -262,7 +264,7 @@ def delete_bucket(
     @provide_bucket_name
     def create_bucket(
         self,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
     ) -> None:
         """
         Create bucket
@@ -277,7 +279,7 @@ def create_bucket(
 
     @provide_bucket_name
     @unify_bucket_name_and_key
-    def append_string(self, bucket_name: Optional[str], content: str, key: str, pos: int) -> None:
+    def append_string(self, bucket_name: str | None, content: str, key: str, pos: int) -> None:
         """
         Append string to a remote existing file
 
@@ -295,7 +297,7 @@ def append_string(self, bucket_name: Optional[str], content: str, key: str, pos:
 
     @provide_bucket_name
     @unify_bucket_name_and_key
-    def read_key(self, bucket_name: Optional[str], key: str) -> str:
+    def read_key(self, bucket_name: str | None, key: str) -> str:
         """
         Read oss remote object content with the specified key
 
@@ -311,7 +313,7 @@ def read_key(self, bucket_name: Optional[str], key: str) -> str:
 
     @provide_bucket_name
     @unify_bucket_name_and_key
-    def head_key(self, bucket_name: Optional[str], key: str) -> oss2.models.HeadObjectResult:
+    def head_key(self, bucket_name: str | None, key: str) -> oss2.models.HeadObjectResult:
         """
         Get meta info of the specified remote object
 
@@ -327,7 +329,7 @@ def head_key(self, bucket_name: Optional[str], key: str) -> oss2.models.HeadObje
 
     @provide_bucket_name
     @unify_bucket_name_and_key
-    def key_exist(self, bucket_name: Optional[str], key: str) -> bool:
+    def key_exist(self, bucket_name: str | None, key: str) -> bool:
         """
         Find out whether the specified key exists in the oss remote storage
 
@@ -360,7 +362,7 @@ def get_credential(self) -> oss2.auth.Auth:
 
         return oss2.Auth(oss_access_key_id, oss_access_key_secret)
 
-    def get_default_region(self) -> Optional[str]:
+    def get_default_region(self) -> str | None:
         extra_config = self.oss_conn.extra_dejson
         auth_type = extra_config.get('auth_type', None)
         if not auth_type:

airflow/providers/alibaba/cloud/log/oss_task_handler.py

@@ -15,6 +15,8 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+from __future__ import annotations
+
 import contextlib
 import os
 import pathlib

airflow/providers/alibaba/cloud/operators/oss.py

@@ -15,9 +15,10 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-
 """This module contains Alibaba Cloud OSS operators."""
-from typing import TYPE_CHECKING, Optional
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
 
 from airflow.models import BaseOperator
 from airflow.providers.alibaba.cloud.hooks.oss import OSSHook
@@ -38,7 +39,7 @@ class OSSCreateBucketOperator(BaseOperator):
     def __init__(
         self,
         region: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
         oss_conn_id: str = 'oss_default',
         **kwargs,
     ) -> None:
@@ -47,7 +48,7 @@ def __init__(
         self.region = region
         self.bucket_name = bucket_name
 
-    def execute(self, context: 'Context'):
+    def execute(self, context: Context):
         oss_hook = OSSHook(oss_conn_id=self.oss_conn_id, region=self.region)
         oss_hook.create_bucket(bucket_name=self.bucket_name)
 
@@ -64,7 +65,7 @@ class OSSDeleteBucketOperator(BaseOperator):
     def __init__(
         self,
         region: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
         oss_conn_id: str = 'oss_default',
         **kwargs,
     ) -> None:
@@ -73,7 +74,7 @@ def __init__(
         self.region = region
         self.bucket_name = bucket_name
 
-    def execute(self, context: 'Context'):
+    def execute(self, context: Context):
         oss_hook = OSSHook(oss_conn_id=self.oss_conn_id, region=self.region)
         oss_hook.delete_bucket(bucket_name=self.bucket_name)
 
@@ -94,7 +95,7 @@ def __init__(
         key: str,
         file: str,
         region: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
         oss_conn_id: str = 'oss_default',
         **kwargs,
     ) -> None:
@@ -105,7 +106,7 @@ def __init__(
         self.region = region
         self.bucket_name = bucket_name
 
-    def execute(self, context: 'Context'):
+    def execute(self, context: Context):
         oss_hook = OSSHook(oss_conn_id=self.oss_conn_id, region=self.region)
         oss_hook.upload_local_file(bucket_name=self.bucket_name, key=self.key, file=self.file)
 
@@ -126,7 +127,7 @@ def __init__(
         key: str,
         file: str,
         region: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
         oss_conn_id: str = 'oss_default',
         **kwargs,
     ) -> None:
@@ -137,7 +138,7 @@ def __init__(
         self.region = region
         self.bucket_name = bucket_name
 
-    def execute(self, context: 'Context'):
+    def execute(self, context: Context):
         oss_hook = OSSHook(oss_conn_id=self.oss_conn_id, region=self.region)
         oss_hook.download_file(bucket_name=self.bucket_name, key=self.key, local_file=self.file)
 
@@ -156,7 +157,7 @@ def __init__(
         self,
         keys: list,
         region: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
         oss_conn_id: str = 'oss_default',
         **kwargs,
     ) -> None:
@@ -166,7 +167,7 @@ def __init__(
         self.region = region
         self.bucket_name = bucket_name
 
-    def execute(self, context: 'Context'):
+    def execute(self, context: Context):
         oss_hook = OSSHook(oss_conn_id=self.oss_conn_id, region=self.region)
         oss_hook.delete_objects(bucket_name=self.bucket_name, key=self.keys)
 
@@ -185,7 +186,7 @@ def __init__(
         self,
         key: str,
         region: str,
-        bucket_name: Optional[str] = None,
+        bucket_name: str | None = None,
         oss_conn_id: str = 'oss_default',
         **kwargs,
     ) -> None:
@@ -195,6 +196,6 @@ def __init__(
         self.region = region
         self.bucket_name = bucket_name
 
-    def execute(self, context: 'Context'):
+    def execute(self, context: Context):
         oss_hook = OSSHook(oss_conn_id=self.oss_conn_id, region=self.region)
         oss_hook.delete_object(bucket_name=self.bucket_name, key=self.key)