A software example
PyQt is the Python binding of the QT toolkit. PyQt contains a QAction class that models an action as a command. Extra optional information is supported for every action, such as description, tooltip, shortcut, and more [j.mp/qaction].
git-cola [j.mp/git-cola], a Git GUI written in Python, uses the Command pattern to modify the model, amend a commit, apply a different election, check out, and so forth [j.mp/git-cola-code].
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