Python 如何在matplotlib中将两个文本框对齐放置在右上角

我正在try 将两个文本框并排放在matplotlib图形的右上角.我关注了this tutorial on text-alignment，可以在右上角放置一个文本框.但我不知道如何添加第二个文本框，以使左上框的右边缘与右上框的左边缘相交.

输出运行最小工作示例的代码如下:

import numpy as np
import matplotlib.pyplot as plt

## data
x = np.linspace(
    -10,
    10,
    51)
shrink_factors = np.linspace(
    1,
    0,
    x.size)
y1 = shrink_factors * np.sin(
    np.exp(
        -1 * x))
y2 = shrink_factors * np.cos(
    np.exp(
        -1 * x))

## get plot parameters
xlim = [
    np.min(x),
    np.max(x)]
ylim = [
    0,
    1.125 * np.max([
        np.max(y1),
        np.max(y2)])]
facecolors = (
    "red",
    "blue")
(color1, color2) = facecolors
label1 = "Label 1"
label2 = "Label 2"
text1 = "RED 1"
text2 = "BLUE 2"
text_background_color = "gainsboro"
text_size = 12
figsize = (12, 7)
# figsize = (7, 12)

## initialize plot
fig, ax = plt.subplots(
    figsize=figsize)

## plot data
ax.plot(
    x,
    y1,
    color=color1,
    label=label1)
ax.plot(
    x,
    y2,
    color=color2,
    label=label2)
ax.grid(
    color="black",
    linestyle=":",
    alpha=0.3)
ax.set_xlim(
    xlim)
ax.set_ylim(
    ylim)
fig.legend(
    mode="expand",
    loc="lower center",
    ncol=2)

## add text-boxes side-by-side
text_box1 = ax.text(
    0.95,
    0.95,
    text1,
    color=color1,
    fontsize=text_size,
    horizontalalignment="right",
    verticalalignment="top",
    transform=ax.transAxes)
text_box1.set_bbox({
    "facecolor" : text_background_color,
    "edgecolor" : "black"})
text_box1_pos = text_box1.get_position()
text_box2 = ax.text(
    text_box1_pos[0],
    0.95,
    text2,
    color=color2,
    fontsize=text_size,
    horizontalalignment="left",
    verticalalignment="top",
    transform=ax.transAxes)
text_box2.set_bbox({
    "facecolor" : text_background_color,
    "edgecolor" : "black"})

## finish plot
plt.show()
plt.close()

说