DateEntry Maxdate Mindate options to dynamically change the available date range in Tkinter GUI
While presenting DateEntry box to the user in a Tkinter window we can set the value of Minimum date and maximum date which the user can select. Dates before Minimum date and after maximum dates are not disabled for user selection. The option mindate and maxdate is used for this.
We can directly set the values of the options mindate and maxdate while declaring the DateEntry.
We can dynamically set the mindate and maxdate by using string variable stringVar() , once the string variable is changed then the trace method executes a callback function my_upd() to set the mindate and maxdate value. While setting the mindate and maxdate value using config() we will check the length of the string variable first, if the length is more and grater than zero then we will set the value to mindate and maxdate.
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