CASMCMS-9225: Do not use itertools.batched

CHANGELOG.md

@@ -6,8 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [2.0.49] - 2024-12-19
 ### Fixed
 - Use correct path to requests_retry_session module
+- Do not use `itertools.batched`, because it is not available in this Python version.
 
 ## [2.0.48] - 2024-12-18
 ### Changed

src/bos/server/redis_db_utils.py

@@ -21,7 +21,6 @@
 # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 # OTHER DEALINGS IN THE SOFTWARE.
 #
-from itertools import batched
 import json
 import logging
 from typing import Callable
@@ -111,9 +110,11 @@ def iter_values(self):
         """
         Iterate through every item in the database. Parse each item as JSON and yield it.
         """
-        for next_keys in batched(self.client.scan_iter(), 500):
-            for datastr in self.client.mget(next_keys):
+        all_keys = list(self.client.scan_iter())
+        while all_keys:
+            for datastr in self.client.mget(all_keys[:500]):
                 yield json.loads(datastr) if datastr else None
+            all_keys = all_keys[500:]
 
     def put(self, key, new_data):
         """Put data in to the database, replacing any old data."""