Version 3.1.1
matplotlib
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matplotlib.axes.Axes.contains

Axes.contains(self, mouseevent)

Test whether the artist contains the mouse event.

Parameters:
mouseevent : matplotlib.backend_bases.MouseEvent
Returns:
contains : bool

Whether any values are within the radius.

details : dict

An artist-specific dictionary of details of the event context, such as which points are contained in the pick radius. See the individual Artist subclasses for details.