AttributeError：“ str”对象没有属性“ values”

我有以下代码：来源：Matplotlib重叠的注释/文本

import matplotlib.pyplot as plt
from adjustText import adjust_text
import numpy as np
together = [(0, 1.0, 0.4), (25, 1.0127692669427917, 0.41), (50, 1.016404709797609, 0.41), (75, 1.1043426359673716, 0.42), (100, 1.1610446924342996, 0.44), (125, 1.1685687930691457, 0.43), (150, 1.3486407784550272, 0.45), (250, 1.4013999168008104, 0.45)]
together.sort()

text = [x for (x,y,z) in together]
eucs = [y for (x,y,z) in together]
covers = [z for (x,y,z) in together]

p1 = plt.plot(eucs,covers,color="black", alpha=0.5)
texts = []
for x, y, s in zip(eucs, covers, text):
    texts.append(plt.text(x, y, s))

plt.xlabel("Proportional Euclidean Distance")
plt.ylabel("Percentage Timewindows Attended")
plt.title("Test plot")
adjust_text(texts, only_move='y', arrowprops=dict(arrowstyle="->", color='r', lw=0.5))
plt.show()

它确实绘图，但我不断收到此错误：

AttributeError: 'str' object has no attribute 'values'

您能否告知我为什么会收到此错误？

完整错误回溯：

runfile('C:/Users//untitled3.py', wdir='C:/Users/')
Traceback (most recent call last):

  File "C:\Users\\untitled3.py", line 27, in <module>
    adjust_text(texts, only_move='y', arrowprops=dict(arrowstyle="->", color='r', lw=0.5))

  File "C:\Users\\anaconda3\lib\site-packages\adjustText\__init__.py", line 439, in adjust_text
    if not any(list(map(lambda val: 'x' in val, only_move.values()))):

AttributeError: 'str' object has no attribute 'values'