Checkbuttons And Buttons: Using Lambda

I am trying to make a number of checkboxes based on a list, however it looks as if I am screwing up the command call and variable aspect of the button. My code is: class Example(

Solution 1:

When you make a lambda function, its references only resolve into values when the function is called. So, if you create lambda functions in a loop with a mutating value (i in your code), each function gets the same i - the last one that was available.

However, when you define a function with a default parameter, that reference is resolved as soon as the function is defined. By adding such a parameter to your lambda functions, you can ensure that they get the value you intended them to.

lambda i=i: self.onClick(i)

This is referred to as lexical scoping or closure, if you'd like to do more research.