Merge branch 'main' into cov-ignores

Author: jakirkham

numcodecs/pcodec.py

@@ -1,7 +1,6 @@
 from typing import Literal, Optional
 
-import numcodecs
-import numcodecs.abc
+from numcodecs.abc import Codec
 from numcodecs.compat import ensure_contiguous_ndarray
 
 try:
@@ -13,7 +12,7 @@
 DEFAULT_MAX_PAGE_N = 262144
 
 
-class PCodec(numcodecs.abc.Codec):
+class PCodec(Codec):
     """
     PCodec (or pco, pronounced "pico") losslessly compresses and decompresses
     numerical sequences with high compression ratio and fast speed.

numcodecs/tests/test_checksum32.py

@@ -3,7 +3,11 @@
 import numpy as np
 import pytest
 
-from numcodecs.checksum32 import CRC32, CRC32C, Adler32
+try:
+    from numcodecs.checksum32 import CRC32, CRC32C, Adler32
+except ImportError:  # pragma: no cover
+    pytest.skip("numcodecs.checksum32 not available", allow_module_level=True)
+
 from numcodecs.tests.common import (
     check_backwards_compatibility,
     check_config,