from tkinter import *
import tkinter.messagebox as tm


class LoginFrame(Frame):
    def __init__(self, master):
        super().__init__(master)

        self.label_1 = Label(self, text="Ingrese Mail:")


        self.entry_1 = Entry(self)


        self.label_1.grid(row=0, sticky=E)

        self.entry_1.grid(row=0, column=1)



        self.logbtn = Button(self, text="Aceptar", command = self._login_btn_clickked)
        self.logbtn.grid(columnspan=2)

        self.pack()

    def _login_btn_clickked(self):
        #print("Clicked")
        username = self.entry_1.get()
        password = self.entry_2.get()

        #print(username, password)

        if username == "john" and password == "password":
            tm.showinfo("Login info", "Welcome John")
        else:
            tm.showerror("Login error", "Incorrect username")




root = Tk()
lf = LoginFrame(root)
root.mainloop()