August 2018
Intermediate to advanced
248 pages
5h 51m
English
Content preview from Mastering Python Design Patterns - Second Edition
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Use cases
Memento is usually used when you need to provide some sort of undo and redo capability for your users.
Another usage is the implementation of a UI dialog with Ok/Cancel buttons, where we would store the state of the object on load, and if the user chooses to cancel, we would restore the initial state of the object.