import tkinter as tk


class StatusBar(tk.Frame):

    def __init__(self, master):
        tk.Frame.__init__(self, master)
        self.label = tk.Label(self, bd=1, relief=tk.SUNKEN, anchor=tk.SW)
        self.label.pack(fill=tk.X)
        self.pack(side=tk.BOTTOM, fill=tk.X)

    def set(self, text):
        self.label.config(text=text)
        self.label.update_idletasks()

    def clear(self):
        self.label.config(text="")
        self.label.update_idletasks()


class Application(tk.Frame):

    def __init__(self, master):
        #master.geometry("500x500")
        master.minsize(height=100, width=100)
        tk.Frame.__init__(self, master)
        self.pack(fill=tk.BOTH)
        self.status = StatusBar(self.master)
        self.create_widgets()

    def create_widgets(self):
        self.btn_files = tk.Button(self, text="Select Files", command=self.selected_files)
        self.btn_files.pack(side=tk.LEFT, pady=5, padx=5)
        self.btn_quit = tk.Button(self, text="Quit", command=self.quit)
        self.btn_quit.pack(side=tk.RIGHT, pady=5, padx=5)

    def selected_files(self):
        opts = {
            'initialdir': '~',
            'filetypes': [('text files', '.txt'), ('python files', '.py')],
            'multiple':True}
        result = tk.filedialog.askopenfilename(**opts)
        print(type(result), ':', result)