from tkinter import *


class FlatButton(Button):
    pixelVirtual = None

    def __init__(self, master=None, **kw):
        if self.pixelVirtual is None:
            self.pixelVirtual = PhotoImage(width=1, height=1)
        kw['relief'] = FLAT
        kw["image"] = self.pixelVirtual,
        kw["compound"] = "c"
        if "height" not in kw:
            kw["height"] = 20
        super(FlatButton, self).__init__(master, kw)