uuid.UUID¶

class uuid.UUID(hex=None, bytes=None, bytes_le=None, fields=None, int=None, version=None)[source]¶

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’.

UUIDs have these read-only attributes:

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)