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Upgrade to ArcGIS 10.3 produces strange behavior with Python

Question asked by Caleb1987 Champion on Jan 5, 2015
Latest reply on Jan 5, 2015 by Caleb1987

I have recently upgraded to ArcGIS 10.3 and all my script tools are not working.  For some reason, within any ArcGIS process, the built-in sys module does not have the argv attribute.  It works as expected in stand-alone.  This affects me because I use sys.argv in virtually all the script tools I have developed for my organization (70+) to pass in arguments.


For example, if I have a function like this:


def function(arg1, arg2, arg3):


It is easier to call the function and pass in parameters from a script tool like this:




rather than:


param1 = arcpy.GetParameterAsText(0)
param2 = arcpy.GetParameterAsText(1)
param3 = arcpy.GetParameterAsText(2)

function(param1, param2, param3)


However, after the upgrade, ONLY in any ArcGIS process the sys module is lacking the argv attribute.  See pictures below:


fails in ArcGIS Python Window



and works as expected in regular IDLE shell



Is there something different about how ArcGIS is accessing Python in version 10.3?