What's the easiest way to reproduce a randomly generated level in Python?

Question

I'm making a game which uses procedurally generated levels, and when I'm testing I'll often want to reproduce a level. Right now I haven't made any way to save the levels, but I thought a simpler solution would be to just reuse the seed used by Python's random module. However I've tried using both `random.seed()` and `random.setstate()` and neither seem to reliably reproduce results. Oddly, I'll sometimes get the same level a few times in a row if I reuse a seed, but it's never completely 100% reliable. Should I just save the level normally (as a file containing its information)? Edit: Thanks for the help everyone. It turns out that my problem came from the fact that I was randomly selecting sprites from groups in Pygame, which are retrieved in unordered dictionary views. I altered my code to avoid using Pygame's sprite groups for that part and it works perfectly now.

Accepted Answer

`random.seed` should work ok, but remember that it is not thread safe - if random numbers are being used elsewhere at the same time you may get different results between runs.

In that case you should use an instance of `random.Random()` to get a private random number generator

```
>>> import random
>>> seed=1234
>>> n=10
>>> random.Random(seed).sample(range(1000),n)
[966, 440, 7, 910, 939, 582, 671, 83, 766, 236]
>>> 
```

Will always return the same result for a given seed

What's the easiest way to reproduce a randomly generated level in Python?

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