Set Random Seed

Type: Action
Category: MATH

Sets the Python random number generator seed to obtain reproducible sequences.

Properties

Property	Type	Default	Description
Seed	Int	42	Generator seed. Must be an integer

Sockets

Socket	Direction	Type
In	Input	Exec
Out	Output	Exec
Seed	Input	Data (Int)

Generated code

__import__('random').seed(42)

Typical usage

Reproducible procedural generation

[On Start] → [Set Random Seed: Seed={Get Property: prop="world_seed"}]
           → [BTCustomTask:
                  # generate map with random.randint / random.choice...
                  # always produces the same result with the same seed]

Debug: reproduce a specific scenario

[On Start] → [Set Random Seed: Seed=12345]
           → [...]

Notes

• Affects Python's random module globally — all random nodes that use random.* will be affected.
• Calling Set Random Seed mid-sequence resets the generator, which can break reproducibility if there are other random calls in between.
• For time-based seeds (non-reproducible behavior), use [BTCustomTask: import random; random.seed(int(Range.logic.getClockTime() * 1000))].