_pick_info.py 文件源码

def _(artist, event):
    offsets = artist.get_offsets()
    ds = np.hypot(
        *(artist.axes.transData.transform(offsets) - [event.x, event.y]).T)
    argmin = np.nanargmin(ds)
    if ds[argmin] < artist.get_pickradius():
        target = with_attrs(offsets[argmin], index=argmin)
        return Selection(artist, target, ds[argmin], None, None)
    else:
        return None