uuid

Larky module containing functions working with uuid.

UUID objects (universally unique identifiers) according to RFC 4122. This module provides immutable UUID objects (class UUID) and the functions uuid1(), uuid3(), uuid4(), uuid5() for generating version 1, 3, 4, and 5 UUIDs as specified in RFC 4122. If all you want is a unique ID, you should probably call uuid1() or uuid4(). Note that uuid1() may compromise privacy since it creates a UUID containing the computer’s network address. uuid4() creates a random UUID.

Examples:

import uuid
# make a UUID based on the host ID and current time
uuid.uuid1()    
UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')
# make a UUID using an MD5 hash of a namespace UUID and a name
uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')
# make a random UUID
uuid.uuid4()    
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 ignored)
x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')
# convert a UUID to a string of hex digits in standard form
str(x)
'00010203-0405-0607-0809-0a0b0c0d0e0f'
# get the raw 16 bytes of the UUID
x.bytes
b'
’
# make a UUID from a 16-byte string uuid.UUID(bytes=x.bytes) UUID(‘00010203-0405-0607-0809-0a0b0c0d0e0f’)

Similar to uuid.

uuid.UUID(hex=None, bytes=None, bytes_le=None, fields=None, int=None, version=None, is_safe=None)

Instances of the UUID class represent UUIDs as specified in RFC 4122. UUID objects are immutable, hashable, and usable as dictionary keys. Converting a UUID to a string with str() yields something in the form ‘12345678-1234-1234-1234-123456789abc’. The UUID constructor accepts five possible forms: a similar string of hexadecimal digits, or a tuple of six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and 48-bit values respectively) as an argument named ‘fields’, or a string of 16 bytes (with all the integer fields in big-endian order) as an argument named ‘bytes’, or a string of 16 bytes (with the first three fields in little-endian order) as an argument named ‘bytes_le’, or a single 128-bit integer as an argument named ‘int’.

Examples:

UUID('{12345678-1234-5678-1234-567812345678}')
UUID('12345678123456781234567812345678')
UUID('urn:uuid:12345678-1234-5678-1234-567812345678')
UUID(bytes=' 4Vx'*4)
UUID(bytes_le='xV4 4 xV' +
...                 ' 4Vx 4Vx')
UUID(fields=(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678))
UUID(int=0x12345678123456781234567812345678)

Exactly one of hex, bytes, bytes_le, fields, or int must be given. The version argument is optional; if given, the resulting UUID will have its variant and version set according to RFC 4122, overriding the given hex, bytes, bytes_le, fields, or int. is_safe is an enum exposed as an attribute on the instance.

Parameters:

• bytes – the UUID as a 16-byte string (containing the six integer fields in big-endian byte order).

• bytes_le – the UUID as a 16-byte string (with time_low, time_mid, and time_hi_version in little-endian byte order).

• fields – a tuple of the six integer fields of the UUID, which are also available as six individual attributes and two derived attributes:

  • time_low the first 32 bits of the UUID

  • time_mid the next 16 bits of the UUID

  • time_hi_version the next 16 bits of the UUID

  • clock_seq_hi_variant the next 8 bits of the UUID

  • clock_seq_low the next 8 bits of the UUID

  • node the last 48 bits of the UUID

  • time the 60-bit timestamp

  • clock_seq the 14-bit sequence number

• hex – the UUID as a 32-character hexadecimal string.

• int – the UUID as a 128-bit integer.

• urn – the UUID as a URN as specified in RFC 4122.

• variant – the UUID variant (one of the constants RESERVED_NCS, RFC_4122, RESERVED_MICROSOFT, or RESERVED_FUTURE).

• version – the UUID version number (1 through 5, meaningful only when the variant is RFC_4122)

• is_safe – an enum indicating whether the UUID has been generated in a way that is safe for multiprocessing applications, via uuid_generate_time_safe(3).

uuid.uuid4()

Generate a random UUID.