代码语言:javascript >>>importuuid # make aUUIDbased on the hostIDand current time>>>uuid.uuid1()# doctest:+SKIPUUID('a8098c1a-f86e-11da-bd1a-00112444be1e')# make aUUIDusing anMD5hashofa namespaceUUIDand a name>>>u
UUID: 通用唯一标识符 ( Universally Unique Identifier ), 对于所有的UUID它可以保证在空间和时间上的唯一性. 它是通过MAC地址, 时间戳, 命名空间, 随机数, 伪随机数来保证生成ID的唯一性, 有着固定的大小( 128 bit ). 它的唯一性和一致性特点使得可以无需注册过程就能够产生一个新的UUID. UUID可以被用作...
UUID('16fd2706-8baf-433b-82eb-8c7fada847da')>>>#make a UUID using a SHA-1 hash of a namespace UUID and a name>>> uuid.uuid5(uuid.NAMESPACE_DNS,'python.org') UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')>>>#make a UUID from a string of hex digits (braces and hyphens...
UUID('16fd2706-8baf-433b-82eb-8c7fada847da')>>>#make a UUID using a SHA-1 hash of a namespace UUID and a name>>> uuid.uuid5(uuid.NAMESPACE_DNS,'python.org') UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')>>>#make a UUID from a string of hex digits (braces and hyphens...
>>> # make a UUID using a SHA-1 hash of a namespace UUID and a name >>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org') UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d') >>> # make a UUID from a string of hex digits (braces and hyphens ignored) ...
>>> # make a UUID using a SHA-1 hash of a namespace UUID and a name >>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org') UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d') >>> # make a UUID from a string of hex digits (braces and hyphens ignored) ...
acquire_time lock = 'string:lock:' + self.lock_name while time.time() < end: # 设置一个锁,设置锁的名称和唯一的UUID值 if self.redis_client.setnx(lock, identifier): # 给锁设置超时时间,防止进程崩溃导致其它进程无法获取锁 self.redis_client.expire(lock, self.time_out) return identifier ...
import hashlib import json from time import time from uuid import uuid4 class Blockchain(object): ... def proof_of_work(self, last_proof): """ Simple Proof of Work Algorithm: - Find a number p' such that hash(pp') contains leading 4 zeroes, where p is the previous p' - p is ...
找到一个数字 P ,使得它与前一个区块的 proof 拼接成的字符串的 Hash 值以 4 个零开头。 blockchain.py import hashlib import json from time import time from uuid import uuid4 class Blockchain(object): ... def proof_of_work(self, last_proof): ...
getAttribute("role")); // if(StringUtil.isEmpty(role)) // return R.error(511,"权限为空"); //根据字段查询是否有相同数据 Wrapper<CailiaoEntity> queryWrapper = new EntityWrapper<CailiaoEntity>() .notIn("id",cailiao.getId()) .andNew() .eq("cailiao_uuid_unmber", cailiao.getCailiaoUuidUn...