register_extension => register_ext_from_image

Author: Ben Cipollini

nibabel/freesurfer/mghformat.py

@@ -18,7 +18,7 @@
 from ..fileholders import FileHolder,  copy_file_map
 from ..arrayproxy import ArrayProxy
 from ..keywordonly import kw_only_meth
-from ..openers import Opener
+from ..openers import ImageOpener
 
 # mgh header
 # See https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/MghFormat
@@ -454,7 +454,7 @@ def writeftr_to(self, fileobj):
         fileobj.write(ftr_nd.tostring())
 
 
-@Opener.register_extension('.mgz', Opener.gz_def)
+@ImageOpener.register_ext_from_image('.mgz', ImageOpener.gz_def)
 class MGHImage(SpatialImage):
     """ Class for MGH format image
     """

nibabel/openers.py

@@ -152,7 +152,7 @@ class ImageOpener(Opener):
     """ Opener-type class passed to image classes to collect compressed extensions
     """    
     @classmethod
-    def register_extension(opener_klass, ext, func):
+    def register_ext_from_image(opener_klass, ext, func):
         """Decorator"""
         def decorate(klass):
             assert ext not in opener_klass.compress_ext_map, \