def selectRaster():        raster = tkFileDialog.askopenfilename(filetypes = [('tif影像', '.tif'),('all files', '.*')])          #弹出选择TIF对话框        rasterpathvar.set(raster)    def selectFeature():        feature = tkFileDialog.askopenfilename(filetypes=[("shapefile",".shp"),('all files', '.*')])        #弹出选择.shp对话框            featurepathvar.set(feature)        ClipArea = featurepathvar.get()            def selectOutpath():        outdir = tkFileDialog.askdirectory()                      #弹出选择文件夹对话框        outpathvar.set(outdir)    root4 = Tk()                                           #创建框体    root4.title('批量裁剪影像')                                 #框体标题    rasterpathvar = StringVar()    featurepathvar = StringVar()    outpathvar = StringVar()    typevar = StringVar()    buffervar = StringVar()    fieldvar = StringVar()    buffervar.set(0)    Label(root4,text = "选择栅格:").grid(row = 0, column = 0)                   #设置文本显示    Label(root4,text = "选择裁剪图层(.shp):").grid(row = 1, column = 0)    Label(root4,text = "裁图字段:").grid(row = 3, column = 0)    Label(root4,text = "外扩距离:").grid(row = 4, column = 0)    Label(root4,text = "裁图方法:").grid(row = 4, column = 0)    Label(root4,text = "选择输出文件夹:").grid(row = 2, column = 0)    Button(root4, text = "浏览", command = selectRaster).grid(row = 0, column = 2)           #按钮设置    Button(root4, text = "浏览", command = selectFeature).grid(row = 1, column = 2)    Button(root4, text = "浏览", command = selectOutpath).grid(row = 2, column = 2)    comboxlist = ttk.Combobox(root4,textvariable=typevar)               #下拉框选择设置    comboxlist["values"] = ("使用输入要素外接矩形裁剪","使用输入要素形状裁剪")    #下拉框内容设置    comboxlist["state"] = "readonly"                                 #设置下拉框值是否可以编辑    comboxlist.grid(row = 5, column = 1)                 #设置下拉框位置    comboxlist.current(0)                    #设置下拉框默认值为元组第一个值    Entry(root4, textvariable = rasterpathvar).grid(row = 0, column = 1)            #设置输入框，值为选择TIF的路径    Entry(root4, textvariable = featurepathvar).grid(row = 1, column = 1)          #这只输入框，值为选择裁切要素的路径    Entry(root4, textvariable = fieldvar).grid(row = 3, column = 1)              #设置输入框，值为输入要素的字段    entry1 = Entry(root4, textvariable = buffervar).grid(row = 4, column = 1)      #    设置输入框，值为输入缓冲距离    Entry(root4, textvariable = outpathvar).grid(row = 2, column = 1)  #    设置输入框，值为输出文件夹路径    Button(root4, text = "开始",command = ClipRaster).grid(row = 6, column = 2)   #    设置按钮，运行ClipRaster函数    root4.mainloop()