Python通用唯一标识符uuid模块使用案例

> 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
'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'

> # make a UUID from a 16-byte string
> uuid.UUID(bytes=x.bytes)
UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')