io.py 文件源码

def load(cls, path, *args, **kwargs):
        name, ext = os.path.splitext(path)
        try:
            return cls._loaders(ext.lstrip('.'))(path, *args, **kwargs)
        except KeyError:
            logger.error('! Unknown loader for format %s. '
                         'Trying with ParmEd as fallback', ext)
            return cls.from_parmed(path, *args, **kwargs)
        except IOError:
            raise IOError('Could not access file {}'.format(path))