arcpy 覆盖已有服务

【解决办法】：
该问题如下几个步骤：

1. 创建sddraft文件
2. 将sdraft文件的serviceType设置为esriServiceDefinitionType_Replacement

3. stage and upload sd 文件


参考如下代码：

import arcpy

import xml.dom.minidom as DOM



#define local variables

# wrkspc mxd document directory

# mxdName mxd document name

# con ArcGIS Server Catalog path

# service service name (include service direcotry)

# summary service summary

# tags services tags



wrkspc = ''C:/test/''

mxdName = ''sample.mxd''

con = ''GIS Servers/arcgis on localhost_6080 (admin)''

service = ''MyMapService''

summary = ''Population Density by County''

tags = ''county, counties, population, density, census''



mapDoc = arcpy.mapping.MapDocument(wrkspc + mxdName)

sddraft = wrkspc + service + ''.sddraft''

sd = wrkspc + service + ''.sd''



# create service definition draft

analysis = arcpy.mapping.CreateMapSDDraft(mapDoc, sddraft, service, ''ARCGIS_SERVER'',

con, True, None, summary, tags)



# set service type to esriServiceDefinitionType_Replacement

newType = ''esriServiceDefinitionType_Replacement''

xml = sddraft

doc = DOM.parse(xml)

descriptions = doc.getElementsByTagName(''Type'')

for desc in descriptions:

if desc.parentNode.tagName == ''SVCManifest'':

if desc.hasChildNodes():

desc.firstChild.data = newType

outXml = xml

f = open(outXml, ''w'')

doc.writexml( f )

f.close()



# stage and upload the service if the sddraft analysis did not contain errors

if analysis[''errors''] == {}:

# Execute StageService

arcpy.StageService_server(sddraft, sd)

# Execute UploadServiceDefinition

arcpy.UploadServiceDefinition_server(sd, con)

else:

# if the sddraft analysis contained errors, display them

print analysis[''errors'']