pip install wxpython

import wx


class PopUpMsg():
    def __init__(self):
        self.app = wx.App()

    def popup_msg(self, message, title=''):
        """
        Display message in standard wx.MessageDialog
        :param message: (string) Value to be displayed
        :return: None
        """
        msg_dlg = wx.MessageDialog(None, message, title, wx.OK | wx.ICON_ERROR)
        val = msg_dlg.ShowModal()
        msg_dlg.Show()
        msg_dlg.Destroy()
        return val


def testit():
    '''
    Test message class
    :return: None
    '''
    pm = PopUpMsg()
    val = pm.popup_msg(message='Click OK if it will make you happy!', title='Do Nothing Message Box')
    if val == wx.ID_OK:
        print('Yippie')


if __name__ == '__main__':
    testit()