For an IntVar() so we can check the different modes of this variable, like this
r :Read - the variable is read by someone w :Write- the variable is written by someone. u :undefined – The variable is deleted
Here is an example which uses w ( write ) mode to display the value of the variable when ever it changes.
We used one Button and used on Click event to change the value of this variable db1 from 5 to 10.
In above examples we used set() method to assign data to the Integer variable and to read the data stored we used get() method. These two methods are frequently used in our scripts.
int1.set(10) # assign value to int1
print(int1.get()) # display the value assigned to int1
We can using set() method to assign data to IntVar, after declaring or we can assign value while declaring the string variable.
int1=tk.IntVar(value=5) # Assign value to int1
Length of IntVar
Before using len function, we have to convert the IntVar to string by using str()
Normal Variable and IntVar
IntVar() is a class in Tkinter. In a GUI application we require various events to be captured to trigger different functions (requirements). If we use normal Python variable with widgets then monitoring the changes is difficult. However by using a IntVar we can monitor the changes and trigger functions based on the requirements.