![]() More than one of these libraries might be available on a particular machine, so configure does not automatically choose one. When invoking configure, specify -with-uuid=bsd to use the BSD functions, or -with-uuid=e2fs to use e2fsprogs' libuuid, or -with-uuid=ossp to use the OSSP UUID library. On Linux, OS X, and some other platforms, suitable functions are provided in the libuuid library, which originally came from the e2fsprogs project (though on modern Linux it is considered part of util-linux-ng). For a baseline, the following code takes about 60 seconds import uuid a uuid.uuid4 () for x in range (10000000) I've tried a few different things (a few different UUID libraries but all of them seem to be unmaintained or not compatible with python 3. On FreeBSD, NetBSD, and some other BSD-derived platforms, suitable UUID creation functions are included in the core libc library. I need to generate a large number of UUIDs (v4). uuid-ossp can now be built without the OSSP library on some platforms. While the OSSP UUID library can still be found at, it is not well maintained, and is becoming increasingly difficult to port to newer platforms. Historically this module depended on the OSSP UUID library, which accounts for the module's name. Version 5 should be preferred over version 3 because SHA-1 is thought to be more secure than MD5. This function generates a version 5 UUID, which works like a version 3 UUID except that SHA-1 is used as a hashing method. Uuid_generate_v5(namespace uuid, name text) This function generates a version 4 UUID, which is derived entirely from random numbers. The generation of UUIDs by this method has no random or environment-dependent element and is therefore reproducible. The name parameter will be MD5-hashed, so the cleartext cannot be derived from the generated UUID. ![]() (It could be any UUID in theory.) The name is an identifier in the selected namespace.įor example: SELECT uuid_generate_v3(uuid_ns_url(), '') The namespace should be one of the special constants produced by the uuid_ns_*() functions shown in Table F-33. This function generates a version 3 UUID in the given namespace using the specified input name. Uuid_generate_v3(namespace uuid, name text) This function generates a version 1 UUID but uses a random multicast MAC address instead of the real MAC address of the computer. Note that UUIDs of this kind reveal the identity of the computer that created the identifier and the time at which it did so, which might make it unsuitable for certain security-sensitive applications. This involves the MAC address of the computer and a time stamp. This function generates a version 1 UUID. Python queries related to uuid v4 python python uuid python uuid generator uuid in python short uuid python python what is uuid import uuid generate.
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