Use typechecking to overcome sphynx error (#7895)

* Use typechecking to overcome spynx error

* Add missing item to chanelog

clients/python-wrapper/CHANGELOG.md

@@ -5,7 +5,11 @@
 ## v0.7.0
 :new: What's new:
 
-- AWS role Authentication: Initiate lakeFS Python client sessions securely using your AWS Role. (#7874)  [Read more](https://docs.lakefs.io/reference/security/external-principals-aws.html#login-with-python) 
+- AWS role Authentication: Initiate lakeFS Python client sessions securely using your AWS Role. (#7874)  [Read more](https://docs.lakefs.io/reference/security/external-principals-aws.html#login-with-python)
+
+:bug: Bugs fixed:
+
+- ObjectWriter write buffer as binary always (#7903)
 
 ## v0.6.2
 

clients/python-wrapper/lakefs/client.py

@@ -10,6 +10,7 @@
 import json
 from threading import Lock
 from typing import Optional
+from typing import TYPE_CHECKING
 from urllib.parse import urlparse, parse_qs
 
 import lakefs_sdk
@@ -20,6 +21,9 @@
 from lakefs.exceptions import NotAuthorizedException, ServerException, api_exception_handler
 from lakefs.models import ServerStorageConfiguration
 
+if TYPE_CHECKING:
+    import boto3
+
 DEFAULT_REGION = 'us-east-1'
 
 
@@ -131,7 +135,7 @@ def _extract_region_from_endpoint(endpoint):
 
 
 def _get_identity_token(
-        session: 'boto3.Session',
+        session: boto3.Session,
         lakefs_host: str,
         additional_headers: dict[str, str],
         presign_expiry
@@ -208,7 +212,7 @@ def _get_identity_token(
 
 
 def from_aws_role(
-        session: 'boto3.Session',
+        session: boto3.Session,
         ttl_seconds: int = 3600,
         presigned_ttl: int = 60,
         additional_headers: dict[str, str] = None,