diff --git a/meshtastic/mesh_interface.py b/meshtastic/mesh_interface.py
index a51309d..89709da 100644
--- a/meshtastic/mesh_interface.py
+++ b/meshtastic/mesh_interface.py
@@ -214,7 +214,7 @@ class MeshInterface:  # pylint: disable=R0902
         return infos
 
     def showNodes(
-        self, includeSelf: bool = True, file=sys.stdout
+        self, includeSelf: bool = True
     ) -> str:  # pylint: disable=W0613
         """Show table summary of nodes in mesh"""
 
diff --git a/meshtastic/slog/arrow.py b/meshtastic/slog/arrow.py
index d656bea..0a53fe8 100644
--- a/meshtastic/slog/arrow.py
+++ b/meshtastic/slog/arrow.py
@@ -2,6 +2,7 @@
 
 import logging
 import os
+from typing import Optional
 
 import pyarrow as pa
 from pyarrow import feather
@@ -19,8 +20,8 @@ class ArrowWriter:
         """
         self.sink = pa.OSFile(file_name, "wb")  # type: ignore
         self.new_rows: list[dict] = []
-        self.schema: pa.Schema | None = None  # haven't yet learned the schema
-        self.writer: pa.RecordBatchFileWriter | None = None
+        self.schema: Optional[pa.Schema] = None  # haven't yet learned the schema
+        self.writer: Optional[pa.RecordBatchStreamWriter] = None
 
     def close(self):
         """Close the stream and writes the file as needed."""
diff --git a/meshtastic/slog/slog.py b/meshtastic/slog/slog.py
index 7cbea09..6452763 100644
--- a/meshtastic/slog/slog.py
+++ b/meshtastic/slog/slog.py
@@ -129,7 +129,10 @@ class StructuredLogger:
         if self.include_raw:
             all_fields.append(("raw", pa.string()))
 
-        self.writer.set_schema(pa.schema(all_fields))
+        # pass in our name->type tuples a pa.fields
+        self.writer.set_schema(
+            pa.schema(map(lambda x: pa.field(x[0], x[1]), all_fields))
+        )
 
         self.raw_file: Optional[
             io.TextIOWrapper
@@ -182,7 +185,9 @@ class StructuredLogger:
                 if r:
                     di = r.named
                     if last_is_str:
-                        di[last_field[0]] = di[last_field[0]].strip()  # remove the trailing space we added
+                        di[last_field[0]] = di[
+                            last_field[0]
+                        ].strip()  # remove the trailing space we added
                         if di[last_field[0]] == "":
                             # If the last field is an empty string, remove it
                             del di[last_field[0]]