Question

我看到一种让我发疯并且我不理解的效果：我从6列SQL Server 2012数据库表（nodeID，string（Class），float（xCoordinate），float（ycoordinate），stringZone，char（参考））中获取数据，我想使用这些实体创建这些实体的网络图networkx Python包。对我来说重要的是我确实有几个带有预定义坐标的网络节点，我想稍后修复它们，其余部分将使用Gephi进行布局。

这是我的代码：

import pyodbc
import networkx as nx

dbConnection = pyodbc.connect('DB-Connection String')
dbCursor = dbConnection.cursor()

theGraph = nx.Graph()
theGraph.position={}
theGraph.deviceClass={}

queryStatement = "SELECT ComponentID, DeviceClass, CoordX, CoordY, AcceleratorZone, Reference FROM dbo.vComponentsWithZones WHERE Reference IN ('M','T')"
for dbRow in dbCursor.execute(queryStatement):
    nodeID = dbRow[0]
    theGraph.add_node(nodeID)

    deviceClass = dbRow[1]
    coordX = (dbRow[2] - 367421.373) / 100
    coordY = (dbRow[3] - 230238.784) / 100
    accelZone = dbRow[4]

    if coordX != None and coordY != None:
        print nodeID, coordX, coordY   <-------------------------
        theGraph.node[nodeID]["viz"] = {'position': {'x': coordX, 'y': coordY, 'z': 0}}

    if accelZone != None:
        theGraph.node[nodeID]["AccelZone"] = accelZone
    if dbRow[1] != None:
        theGraph.node[nodeID]["DeviceClass"] = deviceClass 

    if deviceClass == "Controls":
        theGraph.node[nodeID]["viz"] = {'color': {'r': "255", 'g': "0", 'b': "0", 'a': "1"}}
    elif deviceClass == "Magnet":
        theGraph.node[nodeID]["viz"] = {'color': {'r': "255", 'g': "200", 'b': "0", 'a': "1"}}
    elif deviceClass == "Vacuum":
        theGraph.node[nodeID]["viz"] = {'color': {'r': "0", 'g': "0", 'b': "255", 'a': "1"}}

queryStatement = "SELECT * FROM dbo.ComponentConnections"
for dbRow in dbCursor.execute(queryStatement):
    theGraph.add_edge(dbRow[0],dbRow[1], connectionTyp=dbRow[2])

dbConnection.close()

nx.write_gexf(theGraph,"cryringTopology.gexf")

一切似乎工作正常，看着印刷声明的输出，事情似乎也运作良好;我得到nodeID，coordX，coordY的值，无论数据库中的条目是什么，程序都会评估语句

if coordX != None and coordY != None:

为true并正确执行其中的代码。

Screenshot of print output

然而，输出到GEXF文件只产生6个正确分配坐标的条目，它应该是40到50之类的东西。似乎创建了＆＃34;位置＆＃34;节点属性在某些情况下失败，我完全迷失了。

任何想法???

Answer 1

您在此行中存储的内容

theGraph.node[nodeID]["viz"] = {'position': {'x': coordX, 'y': coordY, 'z': 0}}

被这些行覆盖

theGraph.node[nodeID]["viz"] = {'color': {'r': "255", 'g': "0", 'b': "0", 'a': "1"}}

Python / networkx：注释属性的创建失败了

1 个答案: