create a tkinter window with a calendar in python

main.py
import calendar
import tkinter as tk
import datetime

class Calendar:
    def __init__(self, parent, values):
        self.values = values
        self.parent = parent
        self.cal = calendar.monthcalendar(datetime.date.today().year, datetime.date.today().month)

        self._setup_styles()
        self._build_calendar()

    def _setup_styles(self):
        style = tk.Style(self.parent)
        style.theme_use('default')
        style.configure("Treeview",
            background="white",
            foreground="black",
            rowheight=25,
            fieldbackground="white"
        )
        style.configure("Treeview.Heading", font=("Calibri", 10, 'bold'))

    def _build_calendar(self):
        for i in self.values.get_children():
            self.values.delete(i)
        year, month = datetime.date.today().year, datetime.date.today().month
        header = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
        for day in header:
            self.values.insert('', 'end', text=day)
        for week in self.cal:
            if week[0] == 0:
                self.values.insert('', 'end', text=' ')
            else:
                values = [day if day != 0 else '' for day in week]
                self.values.insert('', 'end', values=values)

if __name__ == '__main__':
    root = tk.Tk()
    root.title("Calendar")
    values = tk.Treeview(root, columns=tuple(range(7)), show="headings")
    for col in range(7):
        values.heading(col, text=str(col))
    values.pack(side="left", fill="both", expand=True)
    cal = Calendar(root, values=values)
    root.mainloop()

1604 chars
49 lines