Split feature class based on number of records arcpy

Question

I am looking for a way to split a feature class into multiple feature classes based on the number of records, probably using python. E.g first 100, next 100, etc. I have so far only seen options to split by attributes.

Answer 1

The following code will split the features into groups of 100 (or the value set in outputNum) then copy them to individual feature classes.

import arcpy

outputNum = 100
outputFCName = "OutputFC"

def listSplit(myList, n):
    for i in xrange(0, len(myList), n):
        yield myList[i:i + n]

arcpy.env.workspace = r"c:\gis\se\gisse.gdb"
lyr = arcpy.mapping.Layer("RandomPoints")
arcpy.SelectLayerByAttribute_management(lyr, "CLEAR_SELECTION")
fList = list()

with arcpy.da.SearchCursor(lyr, "OID@") as cursor:
    for row in cursor:
        fList.append(row[0])

listGroup = listSplit(fList, outputNum)

for x in listGroup:
    lyr.setSelectionSet("NEW", x)
    arcpy.CopyFeatures_management(lyr, arcpy.CreateUniqueName(outputFCName))

Answer 2

As @klewis mentioned you could use the Split By Attribute feature:

Esri provides the following sample code that you could use as mentioned:

# Name: SplitByAttributes.py  
# Description: Use the SplitByAttributes tool to split a feature class by 
# unique values.

# Import required modules
import arcpy

#Set local variables  
in_feature_class = 'c:/data/base.gdb/ecology'  
target_workspace = 'c:/data/output.gdb'  
fields = ['REGION', 'ECO_CODE']  

arcpy.SplitByAttributes_analysis(in_feature_class, target_workspace, fields)