我正试图删除基于this example的散点图创建的一些点。当我在一个子图中有多个散点图并因此有多个PathCollections时，问题就会出现。我正在尝试创建一个包含所有散点图中的点的PathCollection。我如何才能做到这一点？
下面是一个最小代码：

import numpy as np

from matplotlib.collections import PathCollection
from matplotlib.lines import Line2D
from matplotlib.path import Path
from matplotlib.widgets import LassoSelector

class RemoveButton:

    def __init__(self, ax, collection, alpha_other=0.3):
        self.canvas = ax.figure.canvas
        self.collection = collection
        self.alpha_other = alpha_other

        self.xys = collection.get_offsets()
        self.Npts = len(self.xys)

        # Ensure that we have separate colors for each object
        self.fc = collection.get_facecolors()
        if len(self.fc) == 0:
            raise ValueError('Collection must have a facecolor')
        elif len(self.fc) == 1:
            self.fc = np.tile(self.fc, (self.Npts, 1))

        self.lasso = LassoSelector(ax, onselect=self.onselect)
        self.ind = []

    def onselect(self, verts):
        path = Path(verts)
        self.ind = np.nonzero(path.contains_points(self.xys))[0]
        self.fc[:, -1] = self.alpha_other
        self.fc[self.ind, -1] = 1
        self.collection.set_facecolors(self.fc)
        self.canvas.draw_idle()

    def disconnect(self):
        self.lasso.disconnect_events()
        self.fc[:, -1] = 1
        self.collection.set_facecolors(self.fc)
        self.canvas.draw_idle()

if __name__ == '__main__':
    import matplotlib.pyplot as plt

    data = np.random.rand(100, 2)
    data2 = np.random.rand(100, 2)

    subplot_kw = dict(xlim=(0, 1), ylim=(0, 1), autoscale_on=False)
    fig, ax = plt.subplots(subplot_kw=subplot_kw)

    pc1 = ax.scatter(data[:, 0], data[:, 1], s=80)
    pc2 = ax.scatter(data2[:, 0], data2[:, 1], s=80)

    pts = pc1

    selector = RemoveButton(ax=ax, collection=pts)

    def accept(event):
        if event.key == "enter":
            for p in selector.xys[selector.ind]:
                offsets: np.ma.MaskedArray = pts.get_offsets()
                if p in offsets:
                    offsets_list = offsets.tolist()
                    offsets_list.remove(p.tolist())
                    pts.set_offsets(np.ma.MaskedArray(offsets_list))

            fig.canvas.draw()

            selector.disconnect()
            ax.set_title("")

    fig.canvas.mpl_connect("key_press_event", accept)
    ax.set_title("Press enter to accept selected points.")

    plt.show()

如您所见，我只向RemoveButton类传递了一个PathCollection，并且它可以工作。但是我需要能够从任何我想要的散点图中删除点。