The illustration below shows a
script tool dialog box with three parameters: an input workspace, a clip feature
class, and an output workspace. All feature classes in the input workspace are
clipped to the clip feature class (using the
Clip tool) and written
to the output workspace.
In the illustration above, once
parameter values have been entered on the tool dialog box and the OK button is clicked, the script reads the values of the
parameters using GetParameterAsText(), as
follows:
# Import arcpy site-package
#
import arcpy
from arcpy import env
# Read the parameter values:
# 1: input workspace
# 2: input clip features
# 3: output workspace
#
inWorkspace = arcpy.GetParameterAsText(0)
clipFeatures = arcpy.GetParameterAsText(1)
outWorkspace = arcpy.GetParameterAsText(2)
env.workspace = inWorkspace
sys.argv and arcpy.GetParameterAsText
There are two methods for
reading parameters: sys.argv and the arcpy function
GetParameterAsText(). Either approach can be used.
The example above could be rewritten to use sys.argv:
# Read the parameter values:
# 1: input workspace
# 2: input clip features
# 3: output workspace
#
inWorkspace = sys.argv[1]
clipFeatures = sys.argv[2]
outWorkspace = sys.argv[3]
env.workspace = inWorkspace
sys.argv has limitations on the number of characters it
can accept. GetParameterAsText() has no character
limit. For this reason alone, it is recommended that you use GetParameterAsText.
sys.argv[0] returns the script file name.
