RF: Remove (HAVE_INDEXED_GZIP, IndexedGzipFile, DeterministicGzipFile, zstd)

from openers module - now located in _compression.

Author: pauldmccarthy

nibabel/arrayproxy.py

@@ -36,6 +36,7 @@
 import numpy as np
 
 from . import openers
+from ._compression import HAVE_INDEXED_GZIP
 from .fileslice import canonical_slicers, fileslice
 from .volumeutils import apply_read_scaling, array_from_file
 
@@ -263,7 +264,7 @@ def _should_keep_file_open(self, keep_file_open):
          - whether ``self.file_like`` is an an open file handle, or a path to a
            ``'.gz'`` file, or a path to a non-gzip file.
          - whether ``indexed_gzip`` is present (see
-           :attr:`.openers.HAVE_INDEXED_GZIP`).
+           :attr:`._compression.HAVE_INDEXED_GZIP`).
 
         An ``ArrayProxy`` object uses two internal flags to manage
         ``ImageOpener`` instances and underlying file handles.
@@ -330,7 +331,7 @@ def _should_keep_file_open(self, keep_file_open):
         if self._has_fh():
             return False, False
         # if the file is a gzip file, and we have_indexed_gzip,
-        have_igzip = openers.HAVE_INDEXED_GZIP and self.file_like.endswith('.gz')
+        have_igzip = HAVE_INDEXED_GZIP and self.file_like.endswith('.gz')
 
         persist_opener = keep_file_open or have_igzip
         return keep_file_open, persist_opener

nibabel/openers.py

@@ -10,18 +10,15 @@
 
 from __future__ import annotations
 
-import gzip
 import io
 import typing as ty
 from bz2 import BZ2File
 from os.path import splitext
 
-from ._compression import (HAVE_INDEXED_GZIP,
-                           IndexedGzipFile,
-                           DeterministicGzipFile,
-                           zstd,
-                           gzip_open,
-                           zstd_open)
+from ._compression import (
+    gzip_open,
+    zstd_open,
+)
 
 if ty.TYPE_CHECKING:
     from types import TracebackType