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class Machine:
def __init__(self):
self.processing = -1 # 当前正在处理的工件索引 ，-1代表空闲 比如索引是12，调度顺序中12位置上的值比如是7，那就意味着第13个加工的工件是7号工件
self.left_time = 0 # 剩余加工时间 0时，表示该工件在该机器上的处理已完成。
def left_time(self):
"""获取当前剩余处理时间"""
return self.left_time
def process(self):
"""获取当前正在处理的工件索引"""
return self.processing
def next_time(self):
"""减少剩余处理时间（模拟时间流逝）"""
if self.left_time > 0:
self.left_time -= 1
def next_wp(self, time):
"""切换到下一个工件并设置处理时间"""
self.processing += 1
self.left_time = time
def reset(self):
"""重置机器状态"""
self.processing = -1
self.left_time = 0
