after rename, filepaths is none

ALLOWED = ('asp', 'aspx', 'jsp', 'jspx', 'php', 'ps1', 'psm1')

def allowedsuffix(filepath):
    suffix = [x for x in os.path.basename(filepath).split('.') if x in ALLOWED]
    if suffix:
        return True


def md5sumfile(file_full_path):
    if(os.path.isfile(file_full_path)):
        return hashlib.md5(open(file_full_path, 'rb').read()).hexdigest()
    else:
        return None

def walkdir(dir_path):
    """
        此处去重用于减少扫描速度.
    """
    filepath = []
    for rt, dirs, files in os.walk(dir_path):
        for f in files:
            if allowedsuffix(f.lower()):
                # if f.lower().endswith(ALLOWED):
                # filepath.append()

                _file_path = os.path.join(rt, f)
                tmp = {"md5": md5sumfile(_file_path), 'filepath': _file_path}

                filepath.append(copy.deepcopy(tmp))

    res = cleanlistofdict(filepath, "md5")
    filepaths = [x["filepath"] for x in res]

    return filepaths

filepaths = walkdir(yourpath)
for item in filepaths:
    os.rename(item,'{}'.format(md5sumfile(item))