utils.py 文件源码

def get_random_string(length=30, allowed_chars=string.ascii_letters + string.digits):
    """
    Heavily inspired by Plone/Django
    Returns a securely generated random string.
    """
    if not using_sys_random:
        # do our best to get secure random without sysrandom
        seed_value = "%s%s%s" % (random.getstate(), time.time(), RANDOM_SECRET)
        random.seed(sha(seed_value).digest())
    return ''.join([random.choice(allowed_chars) for i in range(length)])