grinimports.py 文件源码

def normalize_file(filename, *args):
    """ Import-normalize a file.

    If the file is not parseable, an empty filelike object will be returned.
    """
    try:
        ast = compiler.parseFile(filename)
    except Exception, e:
        return StringIO('')
    ip = ImportPuller()
    walk(ast, ip)
    return StringIO(ip.as_string())