__init__.py 文件源码

def copy_tree(self, origin, destination, ignore=None):
        if os.path.exists(destination):
            raise shutil.Error(
                '''Destination already exists: "{}"'''.format(destination))
        self.logger.debug('Copying "%s" to "%s"', origin, destination)
        try:
            shutil.copytree(origin, destination,
                            ignore=shutil.ignore_patterns(*ignore or []))
        except (shutil.Error, OSError) as error:
            try:
                shutil.rmtree(destination, ignore_errors=True)
            except (shutil.Error, OSError) as strerror:
                self.logger.error('Error occurred when cleaning after error: "%s"', strerror)
            raise error