Python生成唯一id的方法

目录

•  1. uuid
• 2. hashlib+time
• 3. scrapy.utils.request.request_fingerprint

 

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 1. uuid

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import uuid   def create_uid():     return str(uuid.uuid1())   if __name__ == '__main__':     print(type(create_uid()))     print(create_uid())     print(create_uid())     print(create_uid())   --- <class 'str'> cdcb9030-51e8-11e7-881d-3c52824c8d6f cdcb9031-51e8-11e7-86b4-3c52824c8d6f cdcb9032-51e8-11e7-be6c-3c52824c8d6f

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2. hashlib+time

　　- 示例1：

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import time,hashlib   def create_id():     m = hashlib.md5(str(time.clock()).encode('utf-8'))     return m.hexdigest() if __name__ == '__main__':     print(type(create_id()))     print(create_id())     print(create_id())     print(create_id())   --- <class 'str'> b96d5fca757c00cbd53ae672f60e7ffe 3e8391327caa4850077768d88ee18c7e df28a1e9895052608c2a6897f13d5659

　　- 示例2：

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import time,hashlib   def create_id():     m = hashlib.md5()     m.update(bytes(str(time.clock()),encoding='utf-8'))     return m.hexdigest() if __name__ == '__main__':     print(type(create_id()))     print(create_id())     print(create_id())     print(create_id())   --- <class 'str'> be4a24bec22f46c84a4dde78e68cb838 53e8e0c48c885b91fb2565cbe87b8423 f8fd24c3b8ce1a39217134e22203a5c4

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3. scrapy.utils.request.request_fingerprint

参考：http://www.cnblogs.com/standby/p/7846478.html