Python Calendar GUI

from tkinter import *

import calendar

def showCalender():

    gui = Tk()

    gui.config(background='grey')

    gui.title("Calender for the year")

    gui.geometry("550x600")

    year = int(year_field.get())

    gui_content= calendar.calendar(year)

    calYear = Label(gui, text= gui_content, font= "Consolas 10 bold")

    calYear.grid(row=5, column=1,padx=20)

    gui.mainloop()

if __name__=='__main__':

    new = Tk()

    new.config(background='grey')

    new.title("Calender")

    new.geometry("250x140")

    cal = Label(new, text="Calender",bg='grey',font=("times", 28, "bold"))

    year = Label(new, text="Enter year", bg='dark grey')

    year_field=Entry(new)

    button = Button(new, text='Show Calender',

fg='Black',bg='Blue',command=showCalender)

    cal.grid(row=1, column=1)

    year.grid(row=2, column=1)

    year_field.grid(row=3, column=1)

    button.grid(row=4, column=1)

    new.mainloop()