import arcpy
pnt = arcpy.Point()
pntX = 0;
pntY =  0;
array = arcpy.Array()
mxd = arcpy.mapping.MapDocument("CURRENT")
spatial_reference = mxd.activeDataFrame.spatialReference
pntFc = r"C:UsersAdministratorDesktopCESIMStest.shp"
df = arcpy.mapping.ListDataFrames(mxd)[0]
for lyr in arcpy.mapping.ListLayers(mxd, "", df):
    if lyr.name == "testLine":
        for row in arcpy.da.SearchCursor(lyr, ["SHAPE@"]):
            partnum = 0
            for part in row[0]:
                for pnt in part:
                    if pnt:
                        pointGeom = arcpy.Point()
                        pointGeom.x = pnt.X
                        pointGeom.y = pnt.Y
                        array.add(pointGeom)
                        print("{}, {}".format(pnt.X, pnt.Y))
            partnum += 1
        print "one"
    if lyr.name == "test":
        for row in arcpy.da.SearchCursor(lyr, ["SHAPE@XY"]):
            x, y = row[0]
            pntX =x
            pntY =y
            pnt.x = x
            pnt.y = y
        print "two"
plyLne = arcpy.Polyline(array)
pnt_geometry = arcpy.PointGeometry(arcpy.Point(pntX,pntY), spatial_reference)
distance = plyLne.distanceTo(pnt_geometry)
split_lines =
arcpy.management.SplitLineAtPoint(plyLne,pnt,arcpy.Geometry(),distance)
ptGeoms = [arcpy.Geometry ("POINT", split_lines, sr)]
with arcpy.da.InsertCursor (pntFc, "SHAPE@") as iCurs:
    iCurs.insertRow (ptGeoms)
arcpy.RefreshActiveView ()
print "done"

distance = plyLne.distanceTo(pnt_geometry)