old_contents: from __future__ import (absolute_import, division, print_function,
                          unicode_literals)
  import six
  import sys
  
  from . import try_numba
  from . import preprocessing
  
  
  def performance_report():
      """Display summary of which optional speedups are installed/enabled"""
      print("Yes, but could it be faster?")
      if try_numba.NUMBA_AVAILABLE:
          print("FAST: numba is available and enabled "
                "(fast subnets and feature-finding).")
      else:
          print("SLOW: numba was not found")
  
      if preprocessing.USING_FFTW:
          print("FAST: Using pyfftw for image preprocessing.")
      else:
          print("SLOW: pyfftw not found (slower image preprocessing).")
  
  
  def dependencies():
      """
      Give the version of each of the dependencies -- useful for bug reports.
  
      Returns
      -------
      result : dict
          mapping the name of each package to its version string or, if an
          optional dependency is not installed, None
      """
      packages = ['six', 'numpy', 'scipy', 'matplotlib', 'pandas',
                  'scikit-image', 'pyyaml', 'pytables', 'numba', 'pyfftw']
      result = dict()
      for package_name in packages:
          try:
              package = __import__(package_name)
          except ImportError:
              result[package_name] = None
          else:
              try:
                  version = package.__version__
              except AttributeError:
                  version = package.version  # pyfftw does not have __version__
              result[package_name] = version
      # Build Python version string
      version_info = sys.version_info
      version_string = '.'.join(map(str, [version_info[0], version_info[1],
                                    version_info[2]]))
      result['python'] = version_string
      return result
  
new_contents: from __future__ import (absolute_import, division, print_function,
                          unicode_literals)
  import six
  import sys
  from collections import OrderedDict
  
  from . import try_numba
  from . import preprocessing
  
  
  def performance_report():
      """Display summary of which optional speedups are installed/enabled"""
      print("Yes, but could it be faster?")
      if try_numba.NUMBA_AVAILABLE:
          print("FAST: numba is available and enabled "
                "(fast subnets and feature-finding).")
      else:
          print("SLOW: numba was not found")
  
      if preprocessing.USING_FFTW:
          print("FAST: Using pyfftw for image preprocessing.")
      else:
          print("SLOW: pyfftw not found (slower image preprocessing).")
  
  
  def dependencies():
      """
      Give the version of each of the dependencies -- useful for bug reports.
  
      Returns
      -------
      result : dict
          mapping the name of each package to its version string or, if an
          optional dependency is not installed, None
      """
      packages = ['six', 'numpy', 'scipy', 'matplotlib', 'pandas',
                  'scikit-image', 'pyyaml', 'pytables', 'numba', 'pyfftw']
      result = OrderedDict()
      for package_name in packages:
          try:
              package = __import__(package_name)
          except ImportError:
              result[package_name] = None
          else:
              try:
                  version = package.__version__
              except AttributeError:
                  version = package.version  # pyfftw does not have __version__
              result[package_name] = version
      # Build Python version string
      version_info = sys.version_info
      version_string = '.'.join(map(str, [version_info[0], version_info[1],
                                    version_info[2]]))
      result['python'] = version_string
      return result
  
subject: Return versions as OrderedDict for consistency.