Can't load calendar with corresponding date

Question

from tkinter import *
from tkcalendar import Calendar

def get_date():
    label.configure(text=str(today.get_displayed_month()))
    today.configure(day=str(today.get_date()))

 
win = Tk()
win.title('Calendar Picker')

label = Label(win,text='August 2020')
label.pack(pady=10)

btn = Button(win,text='Pick a date',command=get_date)
btn.pack(pady=10)

today = Calendar(win,selectmode='day',year=2020,month=8,day=6)
today.pack(pady=10)

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python38\lib\tkinter\__init__.py", line 1883, in __call__
    return self.func(*args)
  File "E:\Python\Python Projects Fun\calproject.py", line 6, in get_date
    today.configure(day=str(today.get_date()))
  File "C:\Python38\lib\site-packages\tkcalendar\calendar_.py", line 1612, in configure
    self[item] = value
  File "C:\Python38\lib\site-packages\tkcalendar\calendar_.py", line 518, in __setitem__
    raise AttributeError("Calendar object has no attribute %s." % key)
AttributeError: Calendar object has no attribute day.

Sorry when I pressed the button 'Pick a date' then the above error came out. May I ask what should I use if I want the corresponding date shown on top of the window when I move the months? Because I am not clear with the documentations so could someone teach me the method? What is the best way to fix the above error?

FYI `today.keys()` returns the list of keywords available in `.configure()`. If you want to change the currently selected day, use `today.selection_set(date)` though I don't understand why you want to set the currently selected date as the selected date. I think acw1668's answer is probably what you are looking for. If you want to ensure that the selected date is visible, then use `today.see(date)`. — j_4321, Aug 06 '20 at 07:52
@j_4321 I think what OP wants is that when the month is changed, he wants to highlight the same day as the previous month. — acw1668, Aug 06 '20 at 08:20

acw1668 · Accepted Answer · 2020-08-06T10:59:08.140

3

The error is because day option is only available when you create the Calendar instance. It is not available in configure() function.

If you want to update the label whenever month is changed, you can bind on <<CalendarMonthChanged>> event and update the label inside the event callback:

def on_month_changed(event):
    month, year = today.get_displayed_month()
    label.configure(text=today._month_names[month]+' '+str(year))

...

today = Calendar(win, selectmode='day', year=2020, month=8, day=6)
today.pack(pady=10)
today.bind('<<CalendarMonthChanged>>', on_month_changed)

UPDATE: If you want to select the same day after the month is changed, modify the get_date() function as below:

import calendar
...
def get_date():
    month, year = today.get_displayed_month()
    # get the last day of selected month
    _, lastday = calendar.monthrange(year, month)
    # make sure day is valid day in selected month
    day = min(today._sel_date.day, lastday)
    # select the day in selected month
    today.selection_set(today.date(year, month, day))

UPDATE 2: Below is an example to update the calendar when a date is selected via tkcalendar.DateEntry:

from tkinter import *
from tkcalendar import Calendar, DateEntry

def date_selected(event):
    date = date_entry.get_date()
    cal.selection_set(date)
 
win = Tk()
win.title('Calendar Picker')

date_entry = DateEntry(win, date_pattern='y-mm-dd', state='readonly')
date_entry.pack()
date_entry.bind('<<DateEntrySelected>>', date_selected)

cal = Calendar(win, selectmode='day', date_pattern='y-mm-dd')
cal.pack(pady=10)

win.mainloop()

edited Aug 06 '20 at 10:59

answered Aug 06 '20 at 03:52

acw1668

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I would like to have a button for picking selected date and go to the corresponding date so what should I use? – Dominic Sham Aug 06 '20 at 09:37
It said calendar is not defined after I changed – Dominic Sham Aug 06 '20 at 10:15
Did you add the line `import calendar` as in my updated code? – acw1668 Aug 06 '20 at 10:16
```_, lastday = calendar.monthrange(year, month)``` what does this mean? – Dominic Sham Aug 06 '20 at 10:21
`monthrange(year, month)` returns *weekday of first day of the month* and *number of days in month*, for the *specified year and month*. – acw1668 Aug 06 '20 at 10:23
I may want to do the effect that when I click button can choose specific date then going to the corresponding month and highlight the specific date so how should I change ? – Dominic Sham Aug 06 '20 at 10:28
After I select the specific date why the calendar doesn't go to the specific month? – Dominic Sham Aug 06 '20 at 11:07
It works fine in my Python 3 in Windows 10. – acw1668 Aug 06 '20 at 11:10
Any button after I selected from entrybox? – Dominic Sham Aug 06 '20 at 11:12
What do you mean? I don't understand. – acw1668 Aug 06 '20 at 11:19
For example the entry will have the calendar months to select dates but after click then the below calendar still remain unchanged – Dominic Sham Aug 06 '20 at 11:30
Now default is August but when I select a date from October it still remains at August – Dominic Sham Aug 06 '20 at 11:34
As I said it works fine in my Python environment. The calendar is changed to whatever selected in the date entry. – acw1668 Aug 06 '20 at 11:35
It works fine now after I used the updated ones Thanks – Dominic Sham Aug 06 '20 at 11:36
Please accept the answer if it solves your question. – acw1668 Aug 06 '20 at 11:38
Click which button to accept? – Dominic Sham Aug 06 '20 at 12:02
Click the "check mark" button underneath the vote buttons. – acw1668 Aug 06 '20 at 12:09

Can't load calendar with corresponding date

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