RF: rename compressed_exts to compressed_suffxes

Make clear that these are extra suffixes on the filename indicating the
file is compressed, as opposed to something like '.mgz' which is not a
suffix, but an alternative extension.

Author: matthew-brett

nibabel/analyze.py

@@ -911,7 +911,7 @@ class AnalyzeImage(SpatialImage):
     _meta_sniff_len = header_class.sizeof_hdr
     files_types = (('image', '.img'), ('header', '.hdr'))
     valid_exts = ('.img', '.hdr')
-    _compressed_exts = ('.gz', '.bz2')
+    _compressed_suffixes = ('.gz', '.bz2')
 
     makeable = True
     rw = True

nibabel/freesurfer/mghformat.py

@@ -464,7 +464,7 @@ class MGHImage(SpatialImage):
     header_class = MGHHeader
     valid_exts = ('.mgh', '.mgz')
     files_types = (('image', '.mgh'),)
-    _compressed_exts = ()
+    _compressed_suffixes = ()
 
     makeable = True
     rw = True

nibabel/loadsave.py

@@ -93,7 +93,7 @@ def save(img, filename):
         return
 
     # Be nice to users by making common implicit conversions
-    froot, ext, trailing = splitext_addext(filename, img._compressed_exts)
+    froot, ext, trailing = splitext_addext(filename, ('.gz', '.bz2'))
     lext = ext.lower()
 
     # Special-case Nifti singles and Pairs

nibabel/minc1.py

@@ -301,7 +301,7 @@ class Minc1Image(SpatialImage):
     _meta_sniff_len = 4
     valid_exts = ('.mnc',)
     files_types = (('image', '.mnc'),)
-    _compressed_exts = ('.gz', '.bz2')
+    _compressed_suffixes = ('.gz', '.bz2')
 
     makeable = True
     rw = False

nibabel/minc2.py

@@ -152,7 +152,7 @@ class Minc2Image(Minc1Image):
     the MINC file on load.
     '''
     # MINC2 does not do compressed whole files
-    _compressed_exts = ()
+    _compressed_suffixes = ()
     header_class = Minc2Header
 
     @classmethod

nibabel/spatialimages.py

@@ -137,13 +137,12 @@
 except NameError:  # python 3
     basestring = str
 
-import os.path
 import warnings
 
 import numpy as np
 
-from .filename_parser import types_filenames, TypesFilenamesError, \
-    splitext_addext
+from .filename_parser import (types_filenames, TypesFilenamesError,
+                              splitext_addext)
 from .fileholders import FileHolder
 from .openers import ImageOpener
 from .volumeutils import shape_zoom_affine
@@ -327,7 +326,7 @@ class SpatialImage(object):
     _meta_sniff_len = 0
     files_types = (('image', None),)
     valid_exts = ()
-    _compressed_exts = ()
+    _compressed_suffixes = ()
 
     makeable = True  # Used in test code
     rw = True  # Used in test code
@@ -753,7 +752,7 @@ def filespec_to_file_map(klass, filespec):
         try:
             filenames = types_filenames(
                 filespec, klass.files_types,
-                trailing_suffixes=klass._compressed_exts)
+                trailing_suffixes=klass._compressed_suffixes)
         except TypesFilenamesError:
             raise ImageFileError(
                 'Filespec "{0}" does not look right for class {1}'.format(
@@ -877,11 +876,12 @@ def from_image(klass, img):
     @classmethod
     def _sniff_meta_for(klass, filename, sniff_nbytes):
         froot, ext, trailing = splitext_addext(filename,
-                                               klass._compressed_exts)
+                                               klass._compressed_suffixes)
         # Determine the metadata location, then sniff it
-        t_fnames = types_filenames(filename,
-                                   klass.files_types,
-                                   trailing_suffixes=klass._compressed_exts)
+        t_fnames = types_filenames(
+            filename,
+            klass.files_types,
+            trailing_suffixes=klass._compressed_suffixes)
         meta_fname = t_fnames.get('header', filename)
         try:
             with ImageOpener(meta_fname, 'rb') as fobj:
@@ -893,7 +893,7 @@ def _sniff_meta_for(klass, filename, sniff_nbytes):
     @classmethod
     def path_maybe_image(klass, filename, sniff=None, sniff_max=1024):
         froot, ext, trailing = splitext_addext(filename,
-                                               klass._compressed_exts)
+                                               klass._compressed_suffixes)
         if ext.lower() not in klass.valid_exts:
             return False, sniff
         if not hasattr(klass.header_class, 'may_contain_header'):