The Python method `AnyQt.QtGui.QStandardItem.setData` is used to set the data for a particular role in a `QStandardItem` object. A `QStandardItem` represents an item in a `QStandardItemModel`, which is commonly used in PyQt and PySide applications for storing data. By using `setData`, you can assign a value to a specific role (e.g., display role, edit role) for an item, which can then be accessed and manipulated as needed.
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