擅长:python、mysql、java
<p>标签必须是字符串,格式化数字<a href="http://infohost.nmt.edu/tcc/help/pubs/python25/web/str-format.html#format-codes" rel="nofollow">to exponential format using ^{<cd1>}</a>:</p>
<pre><code>plt.plot(..., label = "MASS1 = %.1e" % mass[0])
</code></pre>