擅长:python、mysql、java
<p>首先:您应该避免代码中的<code>#</code>,因为它将被解释为<a href="https://www.w3schools.com/python/python_comments.asp" rel="nofollow noreferrer">comment</a></p>
<p>根据<code>ax.annotate</code>的<a href="https://matplotlib.org/3.2.1/api/_as_gen/matplotlib.axes.Axes.annotate.html" rel="nofollow noreferrer">documentation</a>,您应该轻松地将线型指定为虚线,以及标签的位置<strong>可以在<a href="https://scipython.com/book/chapter-7-matplotlib/examples/arrow-styles/https://scipython.com/book/chapter-7-matplotlib/examples/arrow-styles/" rel="nofollow noreferrer">here</a>找到一个很好的示例列表。</strong></p>
<p>您应该尝试类似的方法:<code>ax.annotate('dashed line', xy=(0.25,0.2), xytext=(0.6,0.2),arrowprops={'arrowstyle': '-', 'ls': 'dashed'}, va='center', rotate=90)</code></p>