Fix edge case

Author: WilliamBergamin

slack_sdk/web/async_client.py

@@ -3857,8 +3857,8 @@ async def files_upload_v2(
             thread_ts=thread_ts,
             **kwargs,
         )
-        if len(completion.get("files")) == 1:  # type: ignore[arg-type]
-            completion.data["file"] = completion.get("files")[0]  # type: ignore[index]
+        if len(completion.get("files")) == 1:  # type: ignore[arg-type, union-attr, unused-ignore]
+            completion.data["file"] = completion.get("files")[0]  # type: ignore[index, union-attr, unused-ignore]
         return completion
 
     async def files_getUploadURLExternal(

slack_sdk/web/client.py

@@ -3848,8 +3848,8 @@ def files_upload_v2(
             thread_ts=thread_ts,
             **kwargs,
         )
-        if len(completion.get("files")) == 1:  # type: ignore[arg-type]
-            completion.data["file"] = completion.get("files")[0]  # type: ignore[index]
+        if len(completion.get("files")) == 1:  # type: ignore[arg-type, union-attr, unused-ignore]
+            completion.data["file"] = completion.get("files")[0]  # type: ignore[index, union-attr, unused-ignore]
         return completion
 
     def files_getUploadURLExternal(

slack_sdk/web/legacy_client.py

@@ -3859,8 +3859,8 @@ def files_upload_v2(
             thread_ts=thread_ts,
             **kwargs,
         )
-        if len(completion.get("files")) == 1:  # type: ignore[arg-type]
-            completion.data["file"] = completion.get("files")[0]  # type: ignore[index]
+        if len(completion.get("files")) == 1:  # type: ignore[arg-type, union-attr, unused-ignore]
+            completion.data["file"] = completion.get("files")[0]  # type: ignore[index, union-attr, unused-ignore]
         return completion
 
     def files_getUploadURLExternal(