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d755709 6195f6a a0f94c2 6195f6a a0f94c2 6195f6a c01d448 6195f6a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | import random
from typing import List, Optional
# Lazy base-class: import openenv.core only when it's available.
# This lets FactoryEnv be imported (e.g. by the grader) even in minimal
# environments where openenv-core's gradio/PIL chain fails to load.
try:
from openenv.core import Environment as _EnvBase
except Exception:
_EnvBase = object # type: ignore[assignment,misc]
from factory_env.models import FactoryAction, FactoryObservation, FactoryState, Machine, Job
from factory_env.tasks import TASKS
class FactoryEnv(_EnvBase):
"""Smart Factory Scheduling Environment — OpenEnv compliant."""
SUPPORTS_CONCURRENT_SESSIONS = True
def __init__(self, task: str = "easy", seed: int = 42):
super().__init__()
if task not in TASKS:
raise ValueError(f"Unknown task '{task}'. Choose from: {list(TASKS.keys())}")
self.task = task
self.seed = seed
self.config = TASKS[task]
self._rng = random.Random(seed)
self.machines: List[Machine] = []
self.jobs: List[Job] = []
self.completed_jobs: List[Job] = []
self.late_jobs: int = 0
self.time: int = 0
self.max_steps: int = self.config["max_steps"]
def reset(self, seed: Optional[int] = None, episode_id: Optional[str] = None, **kwargs) -> FactoryObservation:
# Allow task to be overridden at reset time (e.g. from inference script)
task = kwargs.get("task", self.task)
if task != self.task and task in TASKS:
self.task = task
self.config = TASKS[task]
self.max_steps = self.config["max_steps"]
use_seed = seed if seed is not None else self.seed
self._rng = random.Random(use_seed)
self.time = 0
self.completed_jobs = []
self.late_jobs = 0
cfg = self.config
self.machines = [
Machine(id=f"M{i+1}", status="idle", failure_rate=cfg.get("failure_rate", 0.0))
for i in range(cfg["num_machines"])
]
self.jobs = []
for i in range(cfg["num_jobs"]):
proc_time = self._rng.randint(*cfg["job_time_range"])
deadline = self.time + proc_time + self._rng.randint(*cfg["deadline_slack"])
priority = self._rng.randint(1, cfg.get("max_priority", 1))
self.jobs.append(Job(id=f"J{i+1}", remaining_time=proc_time, deadline=deadline, priority=priority))
return self._make_obs(reward=None, done=False)
def step(self, action: FactoryAction, timeout_s: Optional[float] = None, **kwargs) -> FactoryObservation:
reward = 0.0
if action.action_type == "assign_job":
job = self._find_job(action.job_id)
machine = self._find_machine(action.machine_id)
if job is None or machine is None or machine.status != "idle":
reward -= 0.1
else:
job.assigned_machine = machine.id
machine.status = "busy"
machine.current_job = job.id
reward += 0.1
elif action.action_type == "repair":
machine = self._find_machine(action.machine_id)
if machine and machine.status == "broken":
machine.status = "idle"
reward += 0.05
else:
reward -= 0.05
self.time += 1
for machine in self.machines:
if machine.status == "busy":
job = self._find_job(machine.current_job)
if job:
job.remaining_time -= 1
if job.remaining_time <= 0:
on_time = self.time <= job.deadline
reward += (1.0 + 0.2 * job.priority) if on_time else 0.3
if not on_time:
self.late_jobs += 1
self.jobs.remove(job)
self.completed_jobs.append(job)
machine.status = "idle"
machine.current_job = None
if machine.status == "busy" and machine.failure_rate > 0:
if self._rng.random() < machine.failure_rate:
machine.status = "broken"
stalled = self._find_job(machine.current_job)
if stalled:
stalled.assigned_machine = None
machine.current_job = None
if self.jobs:
reward -= sum(1 for m in self.machines if m.status == "idle") * 0.05
for job in self.jobs:
if self.time > job.deadline:
reward -= 0.1
done = self.time >= self.max_steps or len(self.jobs) == 0
return self._make_obs(reward=reward, done=done)
@property
def state(self) -> FactoryState:
return FactoryState(
machines=list(self.machines),
pending_jobs=list(self.jobs),
completed_jobs=list(self.completed_jobs),
time=self.time,
task=self.task,
late_jobs=self.late_jobs,
)
def _make_obs(self, reward, done: bool) -> FactoryObservation:
return FactoryObservation(
machines=list(self.machines),
pending_jobs=list(self.jobs),
completed_jobs=list(self.completed_jobs),
time=self.time,
max_steps=self.max_steps,
task=self.task,
reward=reward,
done=done,
)
def _find_job(self, job_id: Optional[str]) -> Optional[Job]:
return next((j for j in self.jobs if j.id == job_id), None) if job_id else None
def _find_machine(self, machine_id: Optional[str]) -> Optional[Machine]:
return next((m for m in self.machines if m.id == machine_id), None) if machine_id else None
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