能给我一个交通信号控制的max pressure的python代码吗，仿真的道路环境为两个连接的交叉口，每个交叉口都有独立的max pressure算法控制，交叉口的代号为j3和j12，需要和sumo联合仿真

以下是一个基于SUMO的交通信号控制的max pressure算法的Python代码，可以仿真两个连接的交叉口，每个交叉口都有独立的max pressure算法控制，交叉口的代号为j3和j12。

import traci
import traci.constants as tc
from sumolib import checkBinary

# 定义交通信号灯状态
GREEN = 0
YELLOW = 1
RED = 2

# 定义交叉口的ID
J3 = "j3"
J12 = "j12"

# 定义max pressure算法的参数
PHASE_DURATION = 30
MIN_GREEN = 10
MAX_GREEN = 20

# 初始化SUMO仿真器
sumoBinary = checkBinary('sumo-gui')
traci.start([sumoBinary, "-c", "cross.sumocfg"])

# 获取交叉口的路口连接
junctions = {
    J3: [
        "e2j3",
        "n2j3"
    ],
    J12: [
        "n2j12",
        "w2j12"
    ]
}

# 初始化交通信号灯状态
light_states = {
    J3: RED,
    J12: RED
}

# 初始化max pressure算法的状态
phase_start_time = traci.simulation.getTime()
current_phase_duration = PHASE_DURATION
next_phase = 0

# 开始仿真
while traci.simulation.getMinExpectedNumber() > 0:
    # 获取当前仿真时间
    current_time = traci.simulation.getTime()

    # 获取交通流量
    flows = {}
    for junction_id, connections in junctions.items():
        for connection_id in connections:
            flow = traci.edge.getWaitingTime(connection_id)
            flows.setdefault(junction_id, []).append(flow)

    # 计算max pressure算法的状态
    if current_time >= phase_start_time + current_phase_duration:
        current_phase_duration = PHASE_DURATION

        # 计算下一个相位的交通流量
        next_flows = []
        for junction_id, junction_flows in flows.items():
            next_flow = sum(junction_flows) - junction_flows[light_states[junction_id]]
            next_flows.append(next_flow)

        # 计算下一个相位的最大压力
        max_pressure = 0
        for i in range(len(next_flows)):
            pressure = sum(next_flows[max(0, i - 1) : min(i + 2, len(next_flows))])
            if pressure > max_pressure:
                max_pressure = pressure
                next_phase = i

        # 更新交通信号灯状态
        for junction_id, connections in junctions.items():
            light_state = RED
            if light_states[junction_id] == next_phase:
                light_state = GREEN
            elif light_states[junction_id] == (next_phase + 1) % len(connections):
                light_state = YELLOW
            traci.trafficlight.setRedYellowGreenState(junction_id, f"G{light_state * 2}r")

        # 更新max pressure算法的状态
        phase_start_time = current_time
        current_phase_duration = max(MIN_GREEN, min(MAX_GREEN, max_pressure))

    # 仿真下一步
    traci.simulationStep()

# 停止仿真器
traci.close()

需要注意的是，这个代码需要先在SUMO软件中定义一个名为"cross.sumocfg"的仿真配置文件，包含两个连接的交叉口和道路环境的定义。另外，需要安装traci模块和SUMO软件，并且在运行代码时需要保证SUMO软件已经启动并正在运行仿真。