Value (arcpy)

Récapitulatif

The value object is returned from GetParameterInfo when used in a script tool's ToolValidator class.

Propriétés

Propriété	Explication	Type de données
isEmpty (Lecture seule)	Indicates if the value object is empty.	Boolean
value (Lecture/écriture)	Provides the value of the value object.	String

Exemple de code

Value example

UpdateParameter populates a value list for the second parameter based on the attribute names of NetCDF file.

def updateParameters(self):
    """Modify the values and properties of parameters before internal
    validation is performed.  This method is called whenever a parameter
    has been changed."""

    # If the parameter has been altered, but not validated
    #
    if self.params[0].altered and not self.params[0].hasBeenValidated:

        # Create a NetCDFFIleProperties object based on the input and 
        #   use it to populate the value list of the sceond parameter.
        #
        netcdf = arcpy.NetCDFFileProperties(self.params[0].value.value)
        aNames = netcdf.getAttributeNames()
        self.params[1].filter.list = aNames
        self.params[1].value = aNames[0]