ArcGIS secondary development method - layer related operations (add, modify)

import arcpy
import os

waveHs = os.listdir('./tifs1')
waveHs = filter(lambda waveH: waveH.endswith('.tif'), waveHs)

waveCs = os.listdir('./contours1')
waveCs = filter(lambda waveC: waveC.endswith('.shp'), waveCs)

waves = zip(waveHs, waveCs)

tifpath = r'C:\Users\user\Desktop\SeaGIS\tifs1'
shppath = r'C:\Users\user\Desktop\SeaGIS\contours1'
n = 0
mxd = arcpy.mapping.MapDocument(r'C:\Users\user\Desktop\SeaGIS\MXD\Template.mxd')
for tif, shp in waves:
    print [tif, shp]
    tiflay = arcpy.mapping.Layer(r'C:\Users\user\Desktop\SeaGIS\MXD\Hs.lyr')
    shplay = arcpy.mapping.Layer(r'C:\Users\user\Desktop\SeaGIS\MXD\Contour.lyr')
    tiflay.replaceDataSource(tifpath, 'RASTER_WORKSPACE', tif[0:-4], True)
    tiflay.name = tif[0:-4]
    shplay.replaceDataSource(shppath, 'SHAPEFILE_WORKSPACE', shp[0:-4], True)
    # shplay.replaceDataSource(shppath, 'SHAPEFILE_WORKSPACE', shp, False)
    shplay.name = shp[0:-4]
    df = arcpy.mapping.ListDataFrames(mxd)[0]
    arcpy.mapping.AddLayer(df, tiflay)
    arcpy.mapping.AddLayer(df, shplay)
    n += 1
    if n == 24:
        end = int(tif[0:-4])
        start = end - 23 * 3600
        mxdname = str(start) + '_' + str(end) + '.mxd'
        mxd.saveACopy(r'C:\Users\user\Desktop\SeaGIS\MXD\{}'.format(mxdname))
        print r'C:\Users\user\Desktop\SeaGIS\MXD\{} has beed created!'.format(mxdname)
        del mxd
        mxd = arcpy.mapping.MapDocument(r'C:\Users\user\Desktop\SeaGIS\MXD\Template.mxd')
        n = 0
print 'ok!'

Key points ： Replace layer data source ,dataset_name The parameter only needs the file name , No file suffix is required , Otherwise you may report an error , And it is better to write a complete absolute path for the workspace path