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import warnings
import napari
from napari._qt.widgets.qt_viewer_buttons import QtViewerPushButton
def raise_():
x = 1
y = 'a string'
import something_that_does_not_exist
return something_that_does_not_exist.fun(x, y)
def warn_():
warnings.warn('warning!')
viewer = napari.Viewer()
layer_buttons = viewer.window._qt_viewer.layerButtons
err_btn = QtViewerPushButton('warning', 'new Error', raise_)
warn_btn = QtViewerPushButton('warning', 'new Warn', warn_)
layer_buttons.layout().insertWidget(3, warn_btn)
layer_buttons.layout().insertWidget(3, err_btn)
if __name__ == '__main__':
napari.run()
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