MNT: No need to inherit object in Python 3

doc/source/devel/biaps/biap_0002.rst

@@ -104,8 +104,8 @@ sliced array, as in:
 
 .. code:: python
 
-    class SomeImage(object):
-        class Slicer(object):
+    class SomeImage:
+        class Slicer:
             def __init__(self, parent):
                 self.parent = parent
             def __getitem__(self, slicedef):

doc/tools/apigen.py

@@ -28,7 +28,7 @@
 DEBUG = True
 
 
-class ApiDocWriter(object):
+class ApiDocWriter:
     """ Class for automatic detection and parsing of API docs
     to Sphinx-parsable reST format"""
 
@@ -118,7 +118,7 @@ def _get_object_name(self, line):
         >>> docwriter = ApiDocWriter('sphinx')
         >>> docwriter._get_object_name("  def func():  ")
         'func'
-        >>> docwriter._get_object_name("  class Klass(object):  ")
+        >>> docwriter._get_object_name("  class Klass:  ")
         'Klass'
         >>> docwriter._get_object_name("  class Klass:  ")
         'Klass'

nibabel/arraywriters.py

@@ -45,7 +45,7 @@ class ScalingError(WriterError):
     pass
 
 
-class ArrayWriter(object):
+class ArrayWriter:
 
     def __init__(self, array, out_dtype=None, **kwargs):
         r""" Initialize array writer

nibabel/batteryrunners.py

@@ -108,7 +108,7 @@ def chk_pixdims(hdr, fix=True):
 """
 
 
-class BatteryRunner(object):
+class BatteryRunner:
     """ Class to run set of checks """
 
     def __init__(self, checks):
@@ -174,7 +174,7 @@ def __len__(self):
         return len(self._checks)
 
 
-class Report(object):
+class Report:
 
     def __init__(self,
                  error=Exception,

nibabel/cmdline/dicomfs.py

@@ -18,7 +18,7 @@
 import logging
 
 
-class dummy_fuse(object):
+class dummy_fuse:
     """Dummy fuse "module" so that nose does not blow during doctests"""
     Fuse = object
 

nibabel/data.py

@@ -31,7 +31,7 @@ class BomberError(DataError, AttributeError):
     pass
 
 
-class Datasource(object):
+class Datasource:
     """ Simple class to add base path to relative path """
 
     def __init__(self, base_path):
@@ -302,7 +302,7 @@ def make_datasource(pkg_def, **kwargs):
     return VersionedDatasource(pth)
 
 
-class Bomber(object):
+class Bomber:
     """ Class to raise an informative error when used """
 
     def __init__(self, name, msg):

nibabel/deprecated.py

@@ -7,7 +7,7 @@
 from .pkg_info import cmp_pkg_version
 
 
-class ModuleProxy(object):
+class ModuleProxy:
     """ Proxy for module that may not yet have been imported
 
     Parameters
@@ -39,12 +39,12 @@ def __repr__(self):
         return f"<module proxy for {self._module_name}>"
 
 
-class FutureWarningMixin(object):
+class FutureWarningMixin:
     """ Insert FutureWarning for object creation
 
     Examples
     --------
-    >>> class C(object): pass
+    >>> class C: pass
     >>> class D(FutureWarningMixin, C):
     ...     warn_message = "Please, don't use this class"
 

nibabel/deprecator.py

@@ -83,7 +83,7 @@ def _add_dep_doc(old_doc, dep_doc, setup='', cleanup=''):
                      old_lines[next_line:] + cleanup_lines + [''])
 
 
-class Deprecator(object):
+class Deprecator:
     """ Class to make decorator marking function or method as deprecated
 
     The decorated function / method will:

nibabel/dft.py

@@ -58,7 +58,7 @@ def __str__(self):
         return fmt % (self.i + 1, self.si.instance_number)
 
 
-class _Study(object):
+class _Study:
 
     def __init__(self, d):
         self.uid = d['uid']
@@ -91,7 +91,7 @@ def patient_name_or_uid(self):
         return self.patient_name
 
 
-class _Series(object):
+class _Series:
 
     def __init__(self, d):
         self.uid = d['uid']
@@ -219,7 +219,7 @@ def nifti_size(self):
         return 352 + 2 * len(self.storage_instances) * self.columns * self.rows
 
 
-class _StorageInstance(object):
+class _StorageInstance:
 
     def __init__(self, d):
         self.uid = d['uid']

nibabel/ecat.py

@@ -511,7 +511,7 @@ def read_subheaders(fileobj, mlist, endianness):
     return subheaders
 
 
-class EcatSubHeader(object):
+class EcatSubHeader:
 
     _subhdrdtype = subhdr_dtype
     _data_type_codes = data_type_codes
@@ -660,7 +660,7 @@ def data_from_fileobj(self, frame=0, orientation=None):
         return data
 
 
-class EcatImageArrayProxy(object):
+class EcatImageArrayProxy:
     """ Ecat implementation of array proxy protocol
 
     The array proxy allows us to freeze the passed fileobj and

nibabel/filebasedimages.py

@@ -22,7 +22,7 @@ class ImageFileError(Exception):
     pass
 
 
-class FileBasedHeader(object):
+class FileBasedHeader:
     """ Template class to implement header protocol """
 
     @classmethod
@@ -60,7 +60,7 @@ def copy(self):
         return deepcopy(self)
 
 
-class FileBasedImage(object):
+class FileBasedImage:
     """
     Abstract image class with interface for loading/saving images from disk.
 

nibabel/fileholders.py

@@ -17,7 +17,7 @@ class FileHolderError(Exception):
     pass
 
 
-class FileHolder(object):
+class FileHolder:
     """ class to contain filename, fileobj and file position
     """
 

nibabel/fileslice.py

@@ -16,7 +16,7 @@
 SKIP_THRESH = 2 ** 8
 
 
-class _NullLock(object):
+class _NullLock:
     """Can be used as no-function dummy object in place of ``threading.lock``.
 
     The ``_NullLock`` is an object which can be used in place of a

nibabel/imageglobals.py

@@ -31,7 +31,7 @@
 logger.addHandler(logging.StreamHandler())
 
 
-class ErrorLevel(object):
+class ErrorLevel:
     """ Context manager to set log error level
     """
 
@@ -49,7 +49,7 @@ def __exit__(self, exc, value, tb):
         return False
 
 
-class LoggingOutputSuppressor(object):
+class LoggingOutputSuppressor:
     """Context manager to prevent global logger from printing"""
 
     def __enter__(self):

nibabel/minc1.py

@@ -39,7 +39,7 @@ class MincError(Exception):
     """ Error when reading MINC files """
 
 
-class Minc1File(object):
+class Minc1File:
     """ Class to wrap MINC1 format opened netcdf object
 
     Although it has some of the same methods as a ``Header``, we use
@@ -235,7 +235,7 @@ def get_scaled_data(self, sliceobj=()):
         return self._normalize(data, sliceobj)
 
 
-class MincImageArrayProxy(object):
+class MincImageArrayProxy:
     """ MINC implementation of array proxy protocol
 
     The array proxy allows us to freeze the passed fileobj and

nibabel/minc2.py

@@ -30,7 +30,7 @@
 from .minc1 import Minc1File, MincHeader, Minc1Image, MincError
 
 
-class Hdf5Bunch(object):
+class Hdf5Bunch:
     """ Make object for accessing attributes of variable
     """
 

nibabel/nicom/dicomwrappers.py

@@ -96,7 +96,7 @@ def wrapper_from_data(dcm_data):
     return SiemensWrapper(dcm_data, csa)
 
 
-class Wrapper(object):
+class Wrapper:
     """ Class to wrap general DICOM files
 
     Methods:

nibabel/nicom/structreader.py

@@ -5,7 +5,7 @@
 _ENDIAN_CODES = '@=<>!'
 
 
-class Unpacker(object):
+class Unpacker:
     """ Class to unpack values from buffer object
 
     The buffer object is usually a string. Caches compiled :mod:`struct`

nibabel/nicom/tests/test_dicomwrappers.py

@@ -124,7 +124,7 @@ class FakeData(dict):
     assert dw.get('some_key') is None
     # Check get defers to dcm_data get
 
-    class FakeData2(object):
+    class FakeData2:
 
         def get(self, key, default):
             return 1
@@ -268,7 +268,7 @@ def test_vol_matching():
     # Just to check the interface, make a pretend signature-providing
     # object.
 
-    class C(object):
+    class C:
         series_signature = {}
     assert dw_empty.is_same_series(C())
 
@@ -386,7 +386,7 @@ def fake_frames(seq_name, field_name, value_seq):
         each element in list is obj.<seq_name>[0].<field_name> =
         value_seq[n] for n in range(N)
     """
-    class Fake(object):
+    class Fake:
         pass
     frames = []
     for value in value_seq:
@@ -410,16 +410,16 @@ def fake_shape_dependents(div_seq, sid_seq=None, sid_dim=None):
     sid_dim : int
         the index of the column in 'div_seq' to use as 'sid_seq'
     """
-    class DimIdxSeqElem(object):
+    class DimIdxSeqElem:
         def __init__(self, dip=(0, 0), fgp=None):
             self.DimensionIndexPointer = dip
             if fgp is not None:
                 self.FunctionalGroupPointer = fgp
-    class FrmContSeqElem(object):
+    class FrmContSeqElem:
         def __init__(self, div, sid):
             self.DimensionIndexValues = div
             self.StackID = sid
-    class PerFrmFuncGrpSeqElem(object):
+    class PerFrmFuncGrpSeqElem:
         def __init__(self, div, sid):
             self.FrameContentSequence = [FrmContSeqElem(div, sid)]
     # if no StackID values passed in then use the values at index 'sid_dim' in

nibabel/nifti1.py

@@ -253,7 +253,7 @@
 ), fields=('code', 'label', 'parameters', 'niistring'))
 
 
-class Nifti1Extension(object):
+class Nifti1Extension:
     """Baseclass for NIfTI1 header extensions.
 
     This class is sufficient to handle very simple text-based extensions, such

nibabel/onetime.py

@@ -27,7 +27,7 @@
 # -----------------------------------------------------------------------------
 
 
-class ResetMixin(object):
+class ResetMixin:
     """A Mixin class to add a .reset() method to users of OneTimeProperty.
 
     By default, auto attributes once computed, become static.  If they happen
@@ -109,7 +109,7 @@ def reset(self):
                 delattr(self, mname)
 
 
-class OneTimeProperty(object):
+class OneTimeProperty:
     """A descriptor to make special properties that become normal attributes.
 
     This is meant to be used mostly by the auto_attr decorator in this module.
@@ -157,7 +157,7 @@ def auto_attr(func):
 
     Examples
     --------
-    >>> class MagicProp(object):
+    >>> class MagicProp:
     ...     @auto_attr
     ...     def a(self):
     ...         return 99

nibabel/openers.py

@@ -80,7 +80,7 @@ def _zstd_open(filename, mode="r", *, level_or_option=None, zstd_dict=None):
                            level_or_option=level_or_option, zstd_dict=zstd_dict)
 
 
-class Opener(object):
+class Opener:
     r""" Class to accept, maybe open, and context-manage file-likes / filenames
 
     Provides context manager to close files that the constructor opened for

nibabel/parrec.py

@@ -579,7 +579,7 @@ def exts2pars(exts_source):
     return headers
 
 
-class PARRECArrayProxy(object):
+class PARRECArrayProxy:
 
     def __init__(self, file_like, header, *, mmap=True, scaling='dv'):
         """ Initialize PARREC array proxy

nibabel/spatialimages.py

@@ -322,7 +322,7 @@ class ImageDataError(Exception):
     pass
 
 
-class SpatialFirstSlicer(object):
+class SpatialFirstSlicer:
     """ Slicing interface that returns a new image with an updated affine
 
     Checks that an image's first three axes are spatial

nibabel/streamlines/array_sequence.py

@@ -24,7 +24,7 @@ def is_ndarray_of_int_or_bool(obj):
             np.issubdtype(obj.dtype, np.bool_)))
 
 
-class _BuildCache(object):
+class _BuildCache:
     def __init__(self, arr_seq, common_shape, dtype):
         self.offsets = list(arr_seq._offsets)
         self.lengths = list(arr_seq._lengths)
@@ -88,7 +88,7 @@ def fn_binary_op(self, value):
 
 
 @_define_operators
-class ArraySequence(object):
+class ArraySequence:
     """ Sequence of ndarrays having variable first dimension sizes.
 
     This is a container that can store multiple ndarrays where each ndarray

nibabel/streamlines/header.py

@@ -2,7 +2,7 @@
 """
 
 
-class Field(object):
+class Field:
     """ Header fields common to multiple streamline file formats.
 
     In IPython, use `nibabel.streamlines.Field??` to list them.