How to use coverage tools in arcpy?

Question

I have a process in which I need to use coverages. I can create the coverages just fine using FeatureClassToCoverage_conversion within arcpy but trying to union 2 coverages together does not work in arcpy with the identified method "Union_arc". I suspect it has something to do with creating an ArcINFO workspace, but I do not know how to use this for _arc commands.

The error is "Object: Tool or environment not found" I have ArcINFO installed and can run these tools successfully in Modelbuilder. I have attached a test script to get Union working. Running 10.1 ArcGIS python 2.7.

import arcpy, os, sys
from arcpy import env
print 'Starting....'
env.OverWriteOutput = True
arcpy.SetProduct("ArcInfo")
env.workspace = "G:\\Projects\\P747\3円_Landbase\\LB1\\temp\\test2\\"
TEMP = "\\\\silver\\clients\\Projects\\P747\3円_Landbase\\LB1\\TEMP\\"
print 'Loaded Data....'
if arcpy.Exists(TEMP + "airworkspace3"):
 arcpy.Delete_management(TEMP + "airworkspace3")
arcpy.CreateArcInfoWorkspace_management(TEMP, "airworkspace3")
r = str(1)
for fc in arcpy.ListFeatureClasses():
 print 'Working on ' + fc
 CovName = TEMP + "airworkspace3\\" + "Layer1"
 CovName3 = TEMP + "airworkspace3\\" + "Success"
 if arcpy.Exists(CovName + str(r)):
 arcpy.Delete_management(CovName + str(r))
 arcpy.FeatureclassToCoverage_conversion(fc + " POLYGON", CovName + r, "", "DOUBLE")
 r += str(1)
print 'Working on Union' 
arcpy.Union_arc(CovName + "1", CovName2+ "2", CovName3)
print 'Completed ' + fc + ' processing....' 

• mwil: what is the error message?
• mwil: can you run the tools and then use Geoprocessing>Results>CopyAsPythonSnippet to help with the code?
• D_C: That is what I have done and the tools are not recognized by arcpy
• mwil: stand alone or in the python window?
• PolyGeo: Would you be able to edit your question to include a code snippet that can be used by someone with an Advanced level license to see precisely where you are stuck, please?

Answer 1

After much fanfare, I found this to work. Seems really strange to have to re-name an alias, but it worked.

import arcinfo, arcpy, os, sys
from arcpy import env
arcpy.SetProduct("ArcInfo")
tbx = arcpy.ImportToolbox(r"C:\Program Files (x86)\ArcGIS\Desktop10.1\ArcToolbox\Toolboxes\Coverage Tools.tbx", "newalias")
print arcpy.Usage("union_newalias")
arcpy.Union_newalias(CovName1, CovName2, CovName3)