Enable PERF401 ruff rule (#1538)

Author: Skylion007

fsspec/caching.py

@@ -345,14 +345,17 @@ def _read_cache(
 
         else:
             # read from the initial
-            out = []
-            out.append(self._fetch_block_cached(start_block_number)[start_pos:])
+            out = [self._fetch_block_cached(start_block_number)[start_pos:]]
 
             # intermediate blocks
             # Note: it'd be nice to combine these into one big request. However
             # that doesn't play nicely with our LRU cache.
-            for block_number in range(start_block_number + 1, end_block_number):
-                out.append(self._fetch_block_cached(block_number))
+            out.extend(
+                map(
+                    self._fetch_block_cached,
+                    range(start_block_number + 1, end_block_number),
+                )
+            )
 
             # final block
             out.append(self._fetch_block_cached(end_block_number)[:end_pos])
@@ -821,14 +824,17 @@ def _read_cache(
 
         else:
             # read from the initial
-            out = []
-            out.append(self._fetch_block_cached(start_block_number)[start_pos:])
+            out = [self._fetch_block_cached(start_block_number)[start_pos:]]
 
             # intermediate blocks
             # Note: it'd be nice to combine these into one big request. However
             # that doesn't play nicely with our LRU cache.
-            for block_number in range(start_block_number + 1, end_block_number):
-                out.append(self._fetch_block_cached(block_number))
+            out.extend(
+                map(
+                    self._fetch_block_cached,
+                    range(start_block_number + 1, end_block_number),
+                )
+            )
 
             # final block
             out.append(self._fetch_block_cached(end_block_number)[:end_pos])

pyproject.toml

@@ -75,7 +75,6 @@ ignore = [
     # Fix these codes later
     "G004",
     "PERF203",
-    "PERF401",
 ]
 
 [tool.pytest.ini_options]