I believe that this is what I've done. the .getParameterInfo() loads the data, while the .execute() saves the data. As I stated, the data is saved and executed correctly, but it does not assigned as default value, unless I refresh the toolbox.
class select_data(object):
def __init__(self):
"""Define the tool (tool name is the name of the class)."""
self.label = "Select Data"
self.description = ""
self.canRunInBackground = False
def getParameterInfo(self):
"""Define parameter definitions"""
cursor = arcpy.da.SearchCursor("Parameters", ['data_set'])
for row in cursor:
ds=row[0]
param0 = arcpy.Parameter(
displayName="File",
name="in_file",
datatype="GPString",
parameterType="Required",
direction="Input")
param0.value=ds
params = [param0]
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."""
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."""
arcpy.env.workspace =""
cursor = arcpy.da.UpdateCursor("Parameters", ['data_set'])
for row in cursor:
row[0]=parameters[0].valueAsText
cursor.updateRow(row)
ds="-"+parameters[0].valueAsText
stp1=arcpy.mapping.Layer("direct_xfer_trips")
stp2=arcpy.mapping.Layer("direct_trips")
stp3=arcpy.mapping.Layer("xfer_trips")
stp4=arcpy.mapping.Layer("xfer_pot")
mxd = arcpy.mapping.MapDocument("CURRENT")
stp1.replaceDataSource("shape_files","SHAPEFILE_WORKSPACE","stops"+ds)
stp2.replaceDataSource("shape_files","SHAPEFILE_WORKSPACE","stops"+ds)
stp3.replaceDataSource("shape_files","SHAPEFILE_WORKSPACE","stops"+ds)
stp4.replaceDataSource("shape_files","SHAPEFILE_WORKSPACE","stops"+ds)
del mxd
return
