How to Avoid Lambda Variable Capture Issues When Creating Multiple Tkinter Buttons in a Loop?

Resolving Button Command Assignment in a Tkinter for Loop Using Lambda

When creating multiple buttons within a for loop using the lambda function, assigning a unique parameter to each button can be challenging. By default, the lambda expression references the name variable, which is reassigned during each loop iteration. This leads to all buttons inheriting the last assigned value.

To solve this issue, default keyword parameters can be employed in the lambda expression. This ensures that each button receives its own distinct parameter:

user_button = Tkinter.Button(self.root, text=name,
                             command=lambda name=name: self.a(name))

By binding the current value of the name variable to the lambda's name keyword argument with each loop iteration, the desired functionality is achieved. Each button will now execute the a() function with its own unique parameter, as intended.

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