擅长:python、mysql、java
<pre><code>>>> l = [('GCK', '3e-12'), ('ist', '6e-30'), ('iso', '5e-15'), ('tig', '5e-77')]
>>> sorted(l, key=lambda x: float(x[1]), reverse=True)
[('GCK', '3e-12'), ('iso', '5e-15'), ('ist', '6e-30'), ('tig', '5e-77')]
</code></pre>