How can I create a layer for each unique field item in a shapefile using Arcpy

Question

#Introduction and imports
import arcpy, string
from arcpy import env

#User Inputs: layer, field name, output workspace (optional)

strTargetLayer = arcpy.GetParameterAsText(0)
strFieldName = arcpy.GetParameterAsText(1)
strSuffix = arcpy.GetParameterAsText(2)
strOutputWorkspace = arcpy.GetParameterAsText(3)

TargetLayer = arcpy.mp.Layer(strTargetLayer)
TargetLayerDQ = TargetLayer.definitionQuery
Field = arcpy.ListFields(strTargetLayer, strFieldName)[0]
env.workspace = strOutputWorkspace
env.overwriteOutput = True
mxd = arcpy.mp.ArcGISProject("CURRENT")
df = df.listMaps("Drill Plan Map-Main")[0]
cursor = arcpy.SearchCursor(strTargetLayer)
lstValues = []

#Creating set(lstValues)
for row in cursor:
    lstValues.append(row.getValue(strFieldName))
lstValueSet = sorted(set(lstValues), reverse = True)
del lstValues

#Creating layers in map
arcpy.AddMessage("Creating layers in map...")
LyrList = []

for i in lstValueSet:
    try:
        if TargetLayerDQ !="":
            if i is None:
                ilyr = arcpy.MakeFeatureLayer_management(TargetLayer, "NULL" + strSuffix).getOutput(0)
                ilyr.definitionQuery = TargetLayerDQ + ' and ' + "\""+Field.name+"\"" +' is NULL'
            elif Field.type == 'String':
                ilyr = arcpy.MakeFeatureLayer_management(TargetLayer, i + strSuffix).getOutput(0)
                ilyr.definitionQuery = TargetLayerDQ + ' and ' + "\""+Field.name+"\"" +' = ' + "\'"+ i +"\'"
            else:
                ilyr = arcpy.MakeFeatureLayer_management(TargetLayer, str(i) + strSuffix).getOutput(0)
                ilyr.definitionQuery = TargetLayerDQ + ' and ' + "\""+Field.name+"\"" +' = ' + str(i)
            arcpy.mapping.InsertLayer(df,TargetLayer,ilyr,"AFTER")
        else:
            if i is None:
                ilyr = arcpy.MakeFeatureLayer_management(TargetLayer, "NULL" + strSuffix).getOutput(0)
                ilyr.definitionQuery = "\""+Field.name+"\"" +' is NULL'
            elif Field.type == 'String':
                ilyr = arcpy.MakeFeatureLayer_management(TargetLayer, i + strSuffix).getOutput(0)
                ilyr.definitionQuery = "\""+Field.name+"\"" +' = ' + "\'"+ i +"\'"
            else:
                ilyr = arcpy.MakeFeatureLayer_management(TargetLayer, str(i) + strSuffix).getOutput(0)
                ilyr.definitionQuery = "\""+Field.name+"\"" +' = ' + str(i)
            arcpy.mapping.InsertLayer(df,TargetLayer,ilyr,"AFTER")
        LyrList.append(ilyr.name)
    except:
        if arcpy.GetMessages(2) != "":
            arcpy.AddMessage("**FAILED TO EXECUTE FOR " + str(i) + "**")
            arcpy.AddMessage(arcpy.GetMessages(2))
        pass
#Saving layers to folder
if strOutputWorkspace != "":
    arcpy.AddMessage("Saving layers in target location...")
    for lyr in arcpy.mapping.ListLayers(mxd):
        if lyr.name in LyrList:
            arcpy.SaveToLayerFile_management(lyr.name,lyr.name,"ABSOLUTE")