擅长:python、mysql、java
<p>从<a href="http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.hist" rel="nofollow noreferrer">documentation for ^{<cd1>}</a>:</p>
<blockquote>
<p>The return value is a tuple (<code>n</code>, <code>bins</code>, <code>patches</code>) or ([<code>n0</code>, <code>n1</code>, ...], <code>bins</code>, [<code>patches0</code>, <code>patches1</code>,...]) if the input contains multiple data.</p>
</blockquote>
<p>从<a href="http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.savefig" rel="nofollow noreferrer">documentation for ^{<cd2>}</a>:</p>
<blockquote>
<p>Save the current figure.</p>
</blockquote>
<p>看起来您应该以调用<code>savefig</code>的方式调用<code>hist</code>,而不是调用{<cd4>}的结果。在</p>
<pre><code>plt.savefig("{}_temperature.png".format(filename), format='png')
...
</code></pre>