Apply suggestions from code review

Co-authored-by: Martin Durant <[email protected]>

fsspec/caching.py

@@ -144,7 +144,7 @@ def __getstate__(self) -> dict[str, Any]:
         del state["cache"]
         return state
 
-    def __setstate__(self, state) -> None:
+    def __setstate__(self, state: dict[str, Any]) -> None:
         # Restore instance attributes
         self.__dict__.update(state)
         self.cache = self._makefile()
@@ -278,7 +278,7 @@ def __getstate__(self) -> dict[str, Any]:
         del state["_fetch_block_cached"]
         return state
 
-    def __setstate__(self, state) -> None:
+    def __setstate__(self, state: dict[str, Any]) -> None:
         self.__dict__.update(state)
         self._fetch_block_cached = functools.lru_cache(state["maxblocks"])(
             self._fetch_block
@@ -471,10 +471,6 @@ def __init__(
         self.data = data
 
     def _fetch(self, start: int | None, stop: int | None) -> bytes:
-        if start is None:
-            start = 0
-        if stop is None:
-            stop = len(self.data)
         return self.data[start:stop]
 
 

fsspec/utils.py

@@ -296,10 +296,7 @@ def read_block(
         length = end - start
 
     f.seek(offset)
-    if length is not None:
-        b = f.read(length)
-    else:
-        b = f.read()
+    b = f.read(length)  # type: ignore[arg-type]
     return b
 
 
@@ -348,14 +345,14 @@ def stringify_path(filepath: str | os.PathLike[str] | pathlib.Path) -> str:
     """
     if isinstance(filepath, str):
         return filepath
-    elif hasattr(filepath, "__fspath__") or isinstance(filepath, os.PathLike):
+    elif hasattr(filepath, "__fspath__"):
         return filepath.__fspath__()
     elif isinstance(filepath, pathlib.Path):
         return str(filepath)
     elif hasattr(filepath, "path"):
         return filepath.path
     else:
-        return filepath
+        return filepath  # type: ignore[return-value]
 
 
 def make_instance(