RandomNumberGenerator

Zusammenfassung

Determines the type and seed that will be used to create random numbers between 0 and 1 for all tools that utilize random numbers, for example, CreateRandomRaster, CreateRandomPoints, and the ArcGIS.Rand() function.

Returned from the randomGenerator environment.

Methodenübersicht

Methode	Erklärung
exportToString ()	Exports the object to its string representation.
loadFromString (string)	Restore the object using its string representation. The exportToString method can be used to create a string representation.

Methoden

exportToString ()

Rückgabewert

Datentyp	Erklärung
String	The string representation of the object.

loadFromString (string)

Parameter	Erklärung	Datentyp
string	The string representation of the object.	String

Codebeispiel

RandomNumberGenerator example

Demonstrate how to create a random number generator object.

import arcpy

# Cannot create RandomNumberGenerator object directly,
# but is returned from CreateRandomValueGenerator function.
#
# CreateRandomValueGenerator takes 2 arguments, seed and distribution
# method. The distribution method options are ACM599,
# MERSENNE_TWISTER, STANDARD_C.
#
# The gen variable is a randomNumberGenerator object that is assigned
# to the randomGenerator environments setting.
#
arcpy.env.randomGenerator = arcpy.CreateRandomValueGenerator(20, "STANDARD_C")

# Calculate a random number using the arcgis.rand() function
result = arcpy.CalculateValue_management("arcgis.rand('normal 0.0 10.0')")

# Get the value from the result object and print it to the Python window.
val = float(result.getOutput(0))
print(val)