python matplotlib、networkx图论

import networkx as nx
import matplotlib.pyplot as plt
g=nx.Graph()
g.add_edge('s','b')
g.add_edge('v','d')
nx.draw(g,with_labels=True)
plt.show()    #plt窗口，plot绘制

import xml.dom.minidom
import networkx as nx
import matplotlib.pyplot as plt

class Point:
    def __init__(self,x,y,refCount,idx):
        self.y = x
        self.x = y
        self.refCount = refCount
        self.idx = idx
class Line:
    def __init__(self,v0,v1,idx):
        self.v0 = v0
        self.v1 = v1
        self.idx = idx
class Bsp:
    def __init__(self):
        self.Points = []
        self.Lines = []

path = 'd:\\户型数据.xml'
tree = xml.dom.minidom.parse(path)
lines = tree.documentElement.getElementsByTagName('Lines')
points = tree.documentElement.getElementsByTagName('Points')

bspData = Bsp()
for pt in points[0].childNodes:
    if isinstance(pt, xml.dom.minidom.Text):
            continue
    idx = int(pt.getElementsByTagName('RefCount')[0].childNodes[0].data)
    pos = pt.getElementsByTagName('Pos')[0].childNodes[0].data
    posNull = pos.find(' ', 2)
    bspData.Points.append(Point(float(pos[2:posNull]),float(pos[posNull+3:]),idx,points[0].childNodes.index(pt)))
    
for ln in lines[0].childNodes:
    if isinstance(ln, xml.dom.minidom.Text):
            continue
    v0 = int(ln.getElementsByTagName('V0')[0].childNodes[0].data)
    v1 = int(ln.getElementsByTagName('V1')[0].childNodes[0].data)
    bspData.Lines.append(Line(v0,v1,lines[0].childNodes.index(ln)))

g=nx.Graph()
for line in bspData.Lines:
        g.add_node(bspData.Points[line.v0])
        g.add_node(bspData.Points[line.v1])
        g.add_edge(bspData.Points[line.v0], bspData.Points[line.v1])

i = 0
lables,points = {},{}
for p in bspData.Points:
    points[p] = (p.x, p.y)
    lables[p] = i
    i+=1

nx.draw(g,pos=points,labels=lables)
plt.show()