code: def _calculate_unpack_filter(cls, includes=None, excludes=None, spec=None):
      
      include_patterns = cls.compile_patterns(includes or [],
                                              field_name='include_patterns',
                                              spec=spec)
      logger.debug('include_patterns: {}'
                   .format(list(p.pattern for p in include_patterns)))
      exclude_patterns = cls.compile_patterns(excludes or [],
                                              field_name='exclude_patterns',
                                              spec=spec)
      logger.debug('exclude_patterns: {}'
                   .format(list(p.pattern for p in exclude_patterns)))
      return lambda f: cls._file_filter(f, include_patterns, exclude_patterns)
docs: Take regex patterns and return a filter function.
  
      :param list includes: List of include patterns to pass to _file_filter.
      :param list excludes: List of exclude patterns to pass to _file_filter.