def walker(self, path=None, base_folder=None):
        """
        This method walk a directory structure and create the
        Folders and Files as they appear.
        """
        path = path or self.path
        base_folder = base_folder or self.base_folder
        # prevent trailing slashes and other inconsistencies on path.
        path = os.path.normpath(upath(path))
        if base_folder:
            base_folder = os.path.normpath(upath(base_folder))
            print("The directory structure will be imported in %s" % (base_folder,))
        if self.verbosity >= 1:
            print("Import the folders and files in %s" % (path,))
        root_folder_name = os.path.basename(path)
        for root, dirs, files in os.walk(path):
            rel_folders = root.partition(path)[2].strip(os.path.sep).split(os.path.sep)
            while rel_folders in '':
                rel_folders.remove('')
            if base_folder:
                folder_names = base_folder.split('/') + [root_folder_name] + rel_folders
            else:
                folder_names = [root_folder_name] + rel_folders
            folder = self.get_or_create_folder(folder_names)
            for file_obj in files:
                dj_file = DjangoFile(open(os.path.join(root, file_obj), mode='rb'),
                                     name=file_obj)
                self.import_file(file_obj=dj_file, folder=folder)
        if self.verbosity >= 1:
            print(('folder_created #%s / file_created #%s / ' + 'image_created #%s') % (self.folder_created, self.file_created, self.image_created))
dataset/ETHPy150Open divio/django-filer/filer/management/commands/import_files.py/FileImporter.walker/swapped operands of `in`