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- from __future__ import annotations
- from dataclasses import dataclass, field
- @dataclass
- class CostTracker:
- total_units: int = 0
- events: list[str] = field(default_factory=list)
- def record(self, label: str, units: int) -> None:
- self.total_units += units
- self.events.append(f'{label}:{units}')
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