How to understand closure in a lambda?

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Resolution of variables in lambdas is done when lambda is executed. At this time, for all buttons i=5. To rectify this issue do as follows:

 make_button = Tkinter.Button(frame, text ="make!", 
                              command= lambda i=i: makeId(i))

This creates i as a local variable in a lambda. This local variable will hold correct value of i from the loop. the local variable can have any name, not necessarily i, e.g. command= lambda a=i: makeId(a)).

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