擅长:python、mysql、java
<p>只需在列表理解中使用<code>[random.random() for i in range(N)]</code>。</p>
<p>演示:</p>
<pre><code>>>> import random
>>> N = 3
>>> [random.random() for i in range(N)]
[0.24578599816668256, 0.34567935734766164, 0.6482845150243465]
>>> M = 3
>>> [[random.random() for i in range(N)] for j in range(M)]
[[0.9883394519621589, 0.6533595743059281, 0.866522328922242], [0.5906410405671291, 0.4429977939796209, 0.9472377762689498], [0.6883677407216132, 0.8215813727822125, 0.9770711299473647]]
</code></pre>