Hello. I'm currently using arcgis pro 2.8.2. I go to "Analysis"-->"Python"-->"Python window". And I typed the following code in the screenshot, but I got the error message that "name arcpy not defined" (arcpy_not_defined.png). This is weird because I have read instructions saying that if you use python window within arcgis, you don't need to import arcpy. Even when I import arcpy, it does not work. I was wondering if anyone has any idea what is going on. Thank you.