rohitg00/ai-engineering-from-scratch · error · ValueError

max_experiments must be >= 1

Error message

max_experiments must be >= 1

What it means

Error "max_experiments must be >= 1" thrown in rohitg00/ai-engineering-from-scratch.

Source

Thrown at phases/19-capstone-projects/56-iteration-scheduler/code/main.py:132

class IterationScheduler:
    """Drives a hypothesis queue across N parallel asyncio slots with UCB picking."""

    def __init__(
        self,
        runner: Runner,
        slots: int = 3,
        max_experiments: int = 50,
        max_seconds: float = 30.0,
        exploration_c: float = math.sqrt(2.0),
        paper_threshold: float = 0.7,
        prune_floor: float = 0.2,
        prune_after_runs: int = 3,
        expander: Expander | None = None,
    ) -> None:
        if slots < 1:
            raise ValueError("slots must be >= 1")
        if max_experiments < 1:
            raise ValueError("max_experiments must be >= 1")
        self.runner = runner
        self.slots = slots
        self.max_experiments = max_experiments
        self.max_seconds = max_seconds
        self.exploration_c = exploration_c
        self.paper_threshold = paper_threshold
        self.prune_floor = prune_floor
        self.prune_after_runs = prune_after_runs
        self.expander = expander

    def _pick_next(self, queue: list[Hypothesis], stats: dict[str, BranchStats]) -> int | None:
        best_idx: int | None = None
        best_score = -float("inf")
        total_runs = sum(s.runs for s in stats.values())
        for idx, hyp in enumerate(queue):
            bs = stats.get(hyp.branch)
            if bs is not None and bs.pruned:
                continue

View on GitHub (pinned to 39ea8a1c6d)

When it happens

Trigger: Thrown at phases/19-capstone-projects/56-iteration-scheduler/code/main.py:132 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rohitg00/ai-engineering-from-scratch@39ea8a1c6d (2026-08-26). Data as JSON: /api/errors/73733cd26b2bd117. Report an issue: GitHub.