Python Tkinter ttk calendar

UPDATE: I have fixed the issue and published a new version of tkcalendar.

EDIT: the problem is that in Windows, the drop-down does not open when the downarrow button is clicked. It seems that it comes from the default ttk theme for Windows because it works with other themes. So the workaround is to switch theme and use 'clam' for instance ('alt' should work as well). Meanwhile, I will look into it and see if I can fix the DateEntry for the other themes and release a new version (https://github.com/j4321/tkcalendar/issues/3).

I am not sure what you want to achieve exactly with the DateEntry, but if your goal is to make it look like the one in the picture, it can be done the following way:

import tkinter as tkfrom tkinter import ttkfrom tkcalendar import DateEntryfrom datetime import dateroot = tk.Tk()# change ttk theme to 'clam' to fix issue with downarrow buttonstyle = ttk.Style(root)style.theme_use('clam')class MyDateEntry(DateEntry):    def __init__(self, master=None, **kw):        DateEntry.__init__(self, master=None, **kw)        # add black border around drop-down calendar        self._top_cal.configure(bg='black', bd=1)        # add label displaying today's date below        tk.Label(self._top_cal, bg='gray90', anchor='w',                 text='Today: %s' % date.today().strftime('%x')).pack(fill='x')# create the entry and configure the calendar colorsde = MyDateEntry(root, year=2016, month=9, day=6,                 selectbackground='gray80',                 selectforeground='black',                 normalbackground='white',                 normalforeground='black',                 background='gray90',                 foreground='black',                 bordercolor='gray90',                 othermonthforeground='gray50',                 othermonthbackground='white',                 othermonthweforeground='gray50',                 othermonthwebackground='white',                 weekendbackground='white',                 weekendforeground='black',                 headersbackground='white',                 headersforeground='gray70')de.pack()root.mainloop()

I created a class inheriting from DateEntry to add the label with today's date below the calendar and to create a black border around the drop-down (self._top_cal is the Toplevel containing the calendar).

Then, I created an instance of MyDateEntry and with all calendar options needed to make it look like the picture. In addition, I used the year, month, day options to define the initial date inside the entry.Here is the result: