PEP8 + consistency cleanup

Author: kastman

nibabel/nifti1.py

@@ -380,6 +380,7 @@ def write_to(self, fileobj, byteswap):
         # next 16 byte border
         fileobj.write(b'\x00' * (extstart + rawsize - fileobj.tell()))
 
+
 class Nifti1DicomExtension(Nifti1Extension):
     """Class for NIfTI1 DICOM header extension.
 
@@ -409,19 +410,20 @@ def _is_little_endian(self):
         return True
 
     def _unmangle(self,value):
-        raw_io=BytesIO(value)
-        ds=read_dataset(raw_io,self._is_implicit_VR,self._is_little_endian)
+        bio=BytesIO(value)
+        ds=read_dataset(bio,self._is_implicit_VR,self._is_little_endian)
         return ds
 
     def _mangle(self, value):
-        raw_io=BytesIO()
-        dio=DicomFileLike(raw_io)
+        bio=BytesIO()
+        dio=DicomFileLike(bio)
         dio.is_implicit_VR = self._is_implicit_VR
         dio.is_little_endian = self._is_little_endian
         ds_len=write_dataset(dio,value)
         dio.seek(0)
         return dio.read(ds_len)
 
+
 try:
     from dicom.filereader import read_dataset
     from dicom.filewriter import write_dataset

nibabel/tests/test_nifti1.py

@@ -1117,8 +1117,8 @@ def test_nifti_dicom_extension():
     assert_equal(dcmext._mangle(dcmext.get_content()),dcmbytes_implicit)
     assert_equal(dcmext.get_sizeondisk() % 16, 0)
 
-    raw_io = BytesIO()
-    dcmext.write_to(raw_io,False)
+    bio = BytesIO()
+    dcmext.write_to(bio,False)
 
 class TestNifti1General(object):
     """ Test class to test nifti1 in general