initial_seed

→int

initial_seed()

source edit

Return the seed (key) of the default generator as it was last set.

Reads the 64-bit Philox key $k$ from the default Generator object without advancing its counter. The returned value is the seed that was last applied via manual_seed or seed.

Returns

int

Current seed of the default generator. This is the Philox key $k \in [0,\, 2^{63})$ — a non-negative 63-bit integer.

Notes

initial_seed does not reset or alter the generator state; it is a pure read. Together with get_rng_state, it forms the minimal information needed to checkpoint and restore the full sampling stream:

\text{state} = (k,\, c) \;\Longrightarrow\; \text{next sample} = \text{Philox}(k,\, c)

where $c$ is the counter returned by get_rng_state.

Examples

>>> import lucid
>>> lucid.manual_seed(1337)
>>> lucid.initial_seed()
1337