# Import arcpy module
import arcpy
arcpy.env.workspace = "C:UsersJackDesktopGISBackupParcel.gdb"
arcpy.env.overwriteOutput = True

# Script arguments
Input_Feature_Class = arcpy.GetParameterAsText(0)
if  Input_Feature_Class == '#' or not Input_Feature_Class:
    Input_Feature_Class = Parcel_Selected

# Local variables:
SplitLines = arcpy.GetParameterAsText(1)
if  SplitLines == '#' or not SplitLines:
    SplitLines = "ParcelWithLabel"

# Process: Split Line At Vertices
arcpy.SplitLine_management(Input_Feature_Class, SplitLines)

# Process: Delete Identical
arcpy.DeleteIdentical_management(SplitLines, "shape", "", "0")

# Process: Show Labels
mxd = arcpy.mapping.MapDocument("CURRENT") #Map document reference
dataFrame = arcpy.mapping.ListDataFrames(mxd, "*")[0]
addLayer = arcpy.mapping.Layer(SplitLines)
arcpy.mapping.AddLayer(dataFrame, addLayer)
layer = arcpy.mapping.ListLayers(mxd, "")[0]
if layer.supports("LABELCLASSES"):
    for lblclass in layer.labelClasses:
          lblclass.showClassLabels = True
          lblclass.expression = '"{}" & round([Shape_Length],2) & "{}"'.format("<FNT name='Arial' size='12'>" , "</FNT>")
layer.showLabels = True
arcpy.RefreshActiveView()

mxd = arcpy.mapping.MapDocument("c:/myMXDs/project1/thing.mxd")