擅长:python、mysql、java
<p>对于python 3</p>
<pre><code>import base64
import io
pic_IObytes = io.BytesIO()
plt.savefig(pic_IObytes, format='png')
pic_IObytes.seek(0)
pic_hash = base64.b64encode(pic_IObytes.read())
</code></pre>
<p>原因是<code>cStringIO</code>和{<cd2>}都不推荐使用</p>