Update value table based on selection in multivalue value list - Python Toolbox

Question

Hi, I need a value list which allows the user to select multiple values. Based on this selection, I need to update the first column of a value table with 2 columns. The second column is meant for the user to input values. I am trying this in a Python toolbox. My code looks something like that at this point: import arcpy
class Tool(object):
def __init__(self):
   """Define the tool (tool name is the name of the class)."""
self.label = "Tool"
self.description = ""
self.canRunInBackground = False

def getParameterInfo(self):
   """Define parameter definitions"""
param0 = arcpy.Parameter(
displayName = "Select Fruit",
name = "Fruit_selection",
datatype = "GPString",
parameterType = "Required",
direction = "Input",
multiValue=True)
param0.filter.type = "ValueList"
param0.filter.list = ["Apple","Pear","Peach"]

param1 = arcpy.Parameter(
displayName = "Selection",
name = "Value_table",
datatype = "GPValueTable",
parameterType = "Required",
direction = "Input")
param1.columns =([["String", "Fruit_name"], ["Long","Fruit_price"]])

params = [param0,param1]
   return params

def isLicensed(self):
   """Set whether tool is licensed to execute."""
   return True

def updateParameters(self, parameters):
   """Modify the values and properties of parameters before internal
validation is performed. This method is called whenever a parameter
has been changed."""
vtab = []
if str(parameters[0].value) == ["Apple"]:
    vtab.append(["Jonathan",2500])
    vtab.append(["Gold",1000])
    parameters[1].values = vtab
elif str(parameters[0].value) == ["Pear"]:
    vtab.append(["Anjou",1000])
    vtab.append(["Concorde",2000])
    parameters[1].values = vtab
   return

def updateMessages(self, parameters):
   """Modify the messages created by internal validation for each tool
parameter. This method is called after internal validation."""
   return

def execute(self, parameters, messages):
   """The source code of the tool."""
   return Any help would be much appreciated. Thank you!

WesMiller · Answer

You can set your tool box to accept multi-values and write you dependencies for the multi-values

CristinaBalmus · Answer

Thank you, Wes Miller! I have already seen and used the info on the page you suggested, but this is for a simple drop-down. I need it for a multivalue list.

Regards,

WesMiller · Answer

Try this http://blogs.esri.com/esri/arcgis/2011/08/25/generating-a-choice-list-from-a-field/