python文件选择：tkFileDialog 基础

看了下Tkinter的文档,对于Pop-up dialog有三类,现在用到的是tkFileDialog
tkFileDialog有两种形式:
一个是.askopenfilename(option=value, …) 这个是”打开”对话框
另一个是:asksaveasfilename(option=value, …) 这个是另存为对话框

option参数如下:
defaultextension = s 默认文件的扩展名
filetypes = [(label1, pattern1), (label2, pattern2), …] 设置文件类型下拉菜单里的的选项
initialdir = D 对话框中默认的路径
initialfile = F 对话框中初始化显示的文件名
parent = W 父对话框(由哪个窗口弹出就在哪个上端)
title = T 弹出对话框的标题
如果选中文件的话,确认后会显示文件的完整路径,否则单击取消的话会返回空字符串
[python] view plain copy

#coding=UTF-8  
# __author__ = '极致'  

import Tkinter, Tkconstants, tkFileDialog  

class TkFileDialogExample(Tkinter.Frame):  

    def __init__(self, root):  

        Tkinter.Frame.__init__(self, root)  

        # options for buttons  
        button_opt = {'fill': Tkconstants.BOTH, 'padx': 5, 'pady': 5}  

        # define buttons  
        Tkinter.Button(self, text='askopenfile', command=self.askopenfile).pack(**button_opt)  
        Tkinter.Button(self, text='askopenfilename', command=self.askopenfilename).pack(**button_opt)  
        Tkinter.Button(self, text='asksaveasfile', command=self.asksaveasfile).pack(**button_opt)  
        Tkinter.Button(self, text='asksaveasfilename', command=self.asksaveasfilename).pack(**button_opt)  
        Tkinter.Button(self, text='askdirectory', command=self.askdirectory).pack(**button_opt)  

        # define options for opening or saving a file  
        self.file_opt = options = {}  
        options['defaultextension'] = '.txt'  
        options['filetypes'] = [('all files', '.*'), ('text files', '.txt')]  
        options['initialdir'] = 'C:\\'  
        options['initialfile'] = 'myfile.txt'  
        options['parent'] = root  
        options['title'] = 'This is a title'  

        # This is only available on the Macintosh, and only when Navigation Services are installed.  
        #options['message'] = 'message'  

        # if you use the multiple file version of the module functions this option is set automatically.  
        #options['multiple'] = 1  

        # defining options for opening a directory  
        self.dir_opt = options = {}  
        options['initialdir'] = 'C:\\'  
        options['mustexist'] = False  
        options['parent'] = root  
        options['title'] = 'This is a title'  

    def askopenfile(self):  

        """Returns an opened file in read mode."""  

        return tkFileDialog.askopenfile(mode='r', **self.file_opt)  

    def askopenfilename(self):  

        """Returns an opened file in read mode. 
        This time the dialog just returns a filename and the file is opened by your own code. 
        """  

        # get filename  
        filename = tkFileDialog.askopenfilename(**self.file_opt)  

        # open file on your own  
        if filename:  
            return open(filename, 'r')  

    def asksaveasfile(self):  

        """Returns an opened file in write mode."""  

        return tkFileDialog.asksaveasfile(mode='w', **self.file_opt)  

    def asksaveasfilename(self):  

        """Returns an opened file in write mode. 
        This time the dialog just returns a filename and the file is opened by your own code. 
        """  

        # get filename  
        filename = tkFileDialog.asksaveasfilename(**self.file_opt)  

        # open file on your own  
        if filename:  
            return open(filename, 'w')  

    def askdirectory(self):  

        """Returns a selected directoryname."""  

        return tkFileDialog.askdirectory(**self.dir_opt)  

if __name__ == '__main__':  
    root = Tkinter.Tk()  
    TkFileDialogExample(root).pack()  
    root.mainloop()