Accessing the output of a Python script tool dialog ArcGIS 10.1

Well I couldn't work out how to access the outputs of the script tool from the python addin, but i have achieved the next best thing which works for me. Which was to pass the list from the script in the script tool dialog to a list in the python add in tool. By importing the python add in tool into the script for the script tool I was able to access the list variable.

    import pythonaddins

    parameterList = []


    import PythonAddinToolbar

    #get parameters from dialog
    para1 = arcpy.GetParameterAsText(0)
    para2 = arcpy.GetParameterAsText(1)
    para3 = arcpy.GetParameterAsText(2)
    para4 = arcpy.GetParameterAsText(3)
    para5 = arcpy.GetParameterAsText(4)
    para6 = arcpy.GetParameterAsText(5)

    paraList = [para1,para2,para3,para4,para5]

    PythonAddinToolbar.parameterList = paraList

Another option is to exchange parameters by making use of environment variables. However, this works only for strings.

Set an environment variable in the add-in code:

os.environ['TOOLNAME_VAR'] = 'abc'

Read the environment variable in the script tool code:

param = os.environ['TOOLNAME_VAR']