utilities.py 文件源码

def create_random_name(prefix='aztest', length=24):
    if len(prefix) > length:
        raise ValueError('The length of the prefix must not be longer than random name length')

    padding_size = length - len(prefix)
    if padding_size < 4:
        raise ValueError('The randomized part of the name is shorter than 4, which may not be able to offer enough '
                         'randomness')

    random_bytes = os.urandom(int(math.ceil(float(padding_size) / 8) * 5))
    random_padding = base64.b32encode(random_bytes)[:padding_size]

    return str(prefix + random_padding.decode().lower())