old_contents: from datasource import DataSource, iswritemode, iszip, unzip, splitzipext, \
       Repository, Cache, ensuredirs
  from formats.format import getformats, Format
  from formats.analyze import Analyze
  import formats.nifti1 as nifti1
  
new_contents: from datasource import DataSource, iswritemode, iszip, unzip, splitzipext, \
       Repository, Cache, ensuredirs
  from formats.format import getformats, Format
  from formats.analyze import Analyze
  from formats.nifti1 import Nifti1
  from formats.ecat7 import Ecat7
  from formats.afni import AFNI
  
  
subject: clean up data_io.api