How to use the vapoursynth.core.std.Splice function in VapourSynth

def test_plane_size(self):
        self.assertEqual((160, 120), vsutil.get_plane_size(self.YUV420P8_CLIP, 0))
        self.assertEqual((80, 60), vsutil.get_plane_size(self.YUV420P8_CLIP, 1))
        # these should fail because they don’t have a constant format or size
        with self.assertRaises(ValueError):
            vsutil.get_plane_size(
                vs.core.std.Splice([self.BLACK_SAMPLE_CLIP, self.SMALLER_SAMPLE_CLIP], mismatch=True), 0)
        with self.assertRaises(ValueError):
            vsutil.get_plane_size(
                vs.core.std.Splice([self.YUV444P8_CLIP, self.YUV422P8_CLIP], mismatch=True), 0)

def GetClip(filelist, balpha, mis = False):
	#Returns a VapourSynth clip and alpha clip containing images from filelist
	#Clips need to be spliced together like this to support images with multiple resolutions
	if balpha == True:
		clip, alphaclip =  core.imwri.Read(filelist[0], mismatch=False, alpha=True)
		if len(filelist) > 1:
			filelist = filelist[1:]
			for file in filelist:
				singleclip, singlealphaclip = core.imwri.Read(file, mismatch=False, alpha=True)
				clip = core.std.Splice([clip, singleclip], mismatch = mis)
				alphaclip = core.std.Splice([alphaclip, singlealphaclip], mismatch = mis)
		return clip, alphaclip
	else:
		clip =  core.imwri.Read(filelist[0], mismatch=False, alpha=False)
		if len(filelist) > 1:
			filelist = filelist[1:]
			for file in filelist:
				singleclip = core.imwri.Read(file, mismatch=False, alpha=False)
				clip = core.std.Splice([clip, singleclip], mismatch = mis)
		return clip, core.std.BlankClip(clip, length = clip.num_frames)

if balpha == True:
		clip, alphaclip =  core.imwri.Read(filelist[0], mismatch=False, alpha=True)
		if len(filelist) > 1:
			filelist = filelist[1:]
			for file in filelist:
				singleclip, singlealphaclip = core.imwri.Read(file, mismatch=False, alpha=True)
				clip = core.std.Splice([clip, singleclip], mismatch = mis)
				alphaclip = core.std.Splice([alphaclip, singlealphaclip], mismatch = mis)
		return clip, alphaclip
	else:
		clip =  core.imwri.Read(filelist[0], mismatch=False, alpha=False)
		if len(filelist) > 1:
			filelist = filelist[1:]
			for file in filelist:
				singleclip = core.imwri.Read(file, mismatch=False, alpha=False)
				clip = core.std.Splice([clip, singleclip], mismatch = mis)
		return clip, core.std.BlankClip(clip, length = clip.num_frames)

def GetClip(filelist, balpha, mis = False):
	#Returns a VapourSynth clip and alpha clip containing images from filelist
	#Clips need to be spliced together like this to support images with multiple resolutions
	if balpha == True:
		clip, alphaclip =  core.imwri.Read(filelist[0], mismatch=False, alpha=True)
		if len(filelist) > 1:
			filelist = filelist[1:]
			for file in filelist:
				singleclip, singlealphaclip = core.imwri.Read(file, mismatch=False, alpha=True)
				clip = core.std.Splice([clip, singleclip], mismatch = mis)
				alphaclip = core.std.Splice([alphaclip, singlealphaclip], mismatch = mis)
		return clip, alphaclip
	else:
		clip =  core.imwri.Read(filelist[0], mismatch=False, alpha=False)
		if len(filelist) > 1:
			filelist = filelist[1:]
			for file in filelist:
				singleclip = core.imwri.Read(file, mismatch=False, alpha=False)
				clip = core.std.Splice([clip, singleclip], mismatch = mis)
		return clip, core.std.BlankClip(clip, length = clip.num_frames)

start = start + clip.num_frames
			if not nopreview: #pad the clip with borders
				if fullclip.format != clip.format:
					fullclip = core.std.BlankClip(clip, length = 1)
				if clip.width > fullclip.width:
					fullclip = core.std.AddBorders(fullclip, right = clip.width - fullclip.width)
				if clip.height > fullclip.height:
					fullclip = core.std.AddBorders(fullclip, bottom = clip.height - fullclip.height)
				if clip.width < fullclip.width:
					clip = core.std.AddBorders(clip, right = fullclip.width - clip.width)
				if clip.height < fullclip.height:
					clip = core.std.AddBorders(clip, bottom = fullclip.height - clip.height)
				#Splice everything into a uniform clip for previewing
				fullclip = fullclip + core.std.AssumeFPS(clip, fpsnum = 1)
			else:
				fullclip = core.std.Splice([fullclip, clip], mismatch = 1)
		fullclip = core.std.DeleteFrames(fullclip, [0])
		return fullclip
	else: 
		raise Exception('No input data!')