Value (arcpy)

摘要

值对象用于脚本工具的 ToolValidator 类时将从 GetParameterInfo 中返回。

属性

属性	说明	数据类型
isEmpty (只读)	Indicates if the value object is empty.	Boolean
value (读写)	Provides the value of the value object.	String

代码实例

值示例

UpdateParameter 将根据 NetCDF 文件的属性名称填充第二个参数的值列表。

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.
        net_cdf = arcpy.NetCDFFileProperties(self.params[0].value.value)
        att_names = net_cdf.getAttributeNames()
        self.params[1].filter.list = att_names
        self.params[1].value = att_names[0]

    return