Exists

Résumé

Determines the existence of the specified data object. This function tests for the existence of various data types including feature classes, tables, datasets, shapefiles, workspaces, layers, and files. The function returns a Boolean indicating whether the element exists.

Discussion

Layers in a stand-alone script and layers in an active map can be used as input to Exists.

Syntaxe

Exists (dataset)

Paramètre	Explication	Type de données
dataset	The path to the dataset to be checked for existence.	String

Valeur renvoyée

Type de données	Explication
Boolean	A Boolean value of True will be returned if the specified element exists.

Exemple de code

Exists example

Check for the existence of specified data object.

import arcpy

# Set the current workspace
arcpy.env.workspace = "c:/base/data.gdb"

# Check for existence of data before deleting
if arcpy.Exists("roadbuffer"):
    arcpy.Delete_management("roadbuffer")