from tkinter import *
from tkinter.filedialog import *
import fileinput

width = 400
height = 300


class Window(object):
    def __init__(self, root, w, h):
        self.root = root
        frame = Frame(self.root, width=w, height=h)
        frame.grid(row=0, column=0, rowspan=3, columnspan=3)

        self.menu1 = Menu(root)
        self.root.config(menu=self.menu1)

        self.txt = Text(root, width=79, height=30, font='14')
        self.txt.grid(row=0, column=0)
        self.openf = Button(text='Open', command=self.openfile)
        self.openf.grid(row=1, column=0)
        self.savef = Button(text='Save', command=self.savefileas)
        self.savef.grid(row=1, column=1)
        self.runf = Button(text='Run', command=self.runfile)
        self.runf.grid(row=1, column=2)

        self.txt.delete('1.0', END)

    def openfile(self):
        op = askopenfilename()
        self.txt.delete('1.0', END)
        for l in fileinput.input(op):
            self.txt.insert(END, l)

    def savefileas(self):
        sa = asksaveasfilename()
        letter = self.txt.get(1.0, END)
        f = open(sa, 'w')
        f.write(letter)
        f.close()

    def runfile(self):
        src = askopenfilename()
        str = ""
        for ln in fileinput.input(src):
            str += ln
        obj = compile(str, 'string', 'exec')
        exec(obj)

if __name__ == '__main__':
    root = Tk()
    window1 = Window(root, width, height)
    root.title('prototype1')
    root.mainloop()