擅长:python、mysql、java
<p>不能直接从类调用非静态方法。首先需要实例化Axis对象。在</p>
<p>有很多方法可以获得Axes实例。简单而紧凑的方法是:</p>
<pre><code>fig, ax = plt.subplots()
# this function returns an instance of the Figure class
# and an instance of the Axes class.
ax.annotate(...)
# call annotate() from the Axes instance
</code></pre>