已知电路图和设计规则，利用python实现版图的自动布局 python代码案例

下面是一个基于Python的自动版图布局代码示例，使用了NetworkX和PyQt5库：

import networkx as nx
from PyQt5.QtWidgets import QApplication, QGraphicsScene, QGraphicsView
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPen, QColor

class CircuitGraph(nx.DiGraph):
    def __init__(self):
        super().__init__()

    def create(self, circuit, rules):
        # 将电路图转换为有向图
        for device in circuit.devices:
            self.add_node(device.name, type=device.type, width=device.width, height=device.height)
            for input in device.inputs:
                self.add_edge(input, device.name, type='input', width=rules.get('input_width', 1))
            for output in device.outputs:
                self.add_edge(device.name, output, type='output', width=rules.get('output_width', 1))
        return self

class CircuitLayout():
    def __init__(self, circuit_graph, rules):
        self.graph = circuit_graph
        self.rules = rules
        self.pos = nx.spring_layout(self.graph, k=rules.get('spring_k', 1), iterations=rules.get('spring_iterations', 50))
        self.width = sum([node['width'] for node in self.graph.nodes(data=True)])
        self.height = max([node['height'] for node in self.graph.nodes(data=True)])

    def draw(self):
        app = QApplication([])
        scene = QGraphicsScene()
        view = QGraphicsView(scene)
        view.setRenderHint(QPainter.Antialiasing)
        view.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
        view.setDragMode(QGraphicsView.ScrollHandDrag)
        view.setRenderHint(QPainter.TextAntialiasing)
        view.setRenderHint(QPainter.SmoothPixmapTransform)
        view.setRenderHint(QPainter.HighQualityAntialiasing)
        pen = QPen(QColor(0, 0, 0), 2)
        for source, target, edge in self.graph.edges(data=True):
            source_pos = self.pos[source]
            target_pos = self.pos[target]
            x1, y1 = source_pos[0] * 100 + self.width / 2, source_pos[1] * 100 + self.height / 2
            x2, y2 = target_pos[0] * 100 + self.width / 2, target_pos[1] * 100 + self.height / 2
            line = scene.addLine(x1, y1, x2, y2, pen)
            if edge['type'] == 'input':
                line.setPen(QPen(QColor(255, 0, 0), edge['width']))
            elif edge['type'] == 'output':
                line.setPen(QPen(QColor(0, 255, 0), edge['width']))
        for node, attrs in self.graph.nodes(data=True):
            x, y = self.pos[node][0] * 100 + self.width / 2 - attrs['width'] / 2, self.pos[node][1] * 100 + self.height / 2 - attrs['height'] / 2
            scene.addRect(x, y, attrs['width'], attrs['height'], pen=pen)
        view.setScene(scene)
        view.setWindowTitle('Circuit Layout')
        view.resize(self.width + 50, self.height + 50)
        view.show()
        QApplication.exec_()

# 读取电路图和设计规则
circuit = read_circuit('circuit.xml')
rules = read_rules('rules.xml')

# 将电路图转换为有向图
circuit_graph = CircuitGraph().create(circuit, rules)

# 进行自动布局
circuit_layout = CircuitLayout(circuit_graph, rules)

# 绘制版图
circuit_layout.draw()

在上面的代码中，我们首先将电路图转换为有向图，并使用spring_layout算法进行自动布局。然后，我们使用PyQt5库绘制版图，并根据电路元件的类型和连接关系来设置线条和节点的颜色、宽度等属性。

需要注意的是，以上代码只是一个简单的示例，实际的自动布局过程可能会更加复杂和细致。此外，自动布局需要的算法和技术也非常丰富和复杂，需要对相关领域有深入的了解和掌握。