Best fix (#3)

Fixes the problem by cding and supplying a flag to mypy (that mypy needs this flag is seemingly fixed/changed in later versions of mypy; but that's another pr altogether...). Also fixes a type error that was somehow in the arguments of the program (?!) (I guess this is because you guys are still using implicit optional)

---------

Signed-off-by: wyattscarpenter <[email protected]>

Author: wyattscarpenter

.github/workflows/code-quality-checks.yml

@@ -161,5 +161,6 @@ jobs:
       #----------------------------------------------
       - name: Mypy
         run: |
+          cd src # Need to be in the actual databricks/ folder or mypy does the wrong thing.
           mkdir .mypy_cache # Workaround for bad error message "error: --install-types failed (no mypy cache directory)"; see https://github.com/python/mypy/issues/10768#issuecomment-2178450153
-          poetry run mypy --install-types --non-interactive src/databricks
+          poetry run mypy --config-file ../pyproject.toml --install-types --non-interactive --namespace-packages databricks

src/databricks/sql/utils.py

@@ -134,7 +134,7 @@ def __init__(
         schema_bytes,
         max_download_threads: int,
         start_row_offset: int = 0,
-        result_links: List[TSparkArrowResultLink] = None,
+        result_links: List[TSparkArrowResultLink] = [],
         lz4_compressed: bool = True,
         description: List[List[Any]] = None,
     ):
@@ -161,13 +161,12 @@ def __init__(
                 start_row_offset
             )
         )
-        if result_links is not None:
-            for result_link in result_links:
-                logger.debug(
-                    "- start row offset: {}, row count: {}".format(
-                        result_link.startRowOffset, result_link.rowCount
-                    )
+        for result_link in result_links:
+            logger.debug(
+                "- start row offset: {}, row count: {}".format(
+                    result_link.startRowOffset, result_link.rowCount
                 )
+            )
 
         self.download_manager = ResultFileDownloadManager(
             self.max_download_threads, self.lz4_compressed