擅长:python、mysql、java
<p>我想你在找<a href="http://docs.python.org/2/library/itertools.html#itertools.product">^{<cd1>}</a>:</p>
<pre><code>>>> from itertools import product
>>> [''.join(i) for i in product('ABC',repeat=3)]
['AAA', 'AAB', 'AAC', 'ABA', 'ABB', 'ABC', 'ACA', 'ACB', 'ACC', 'BAA', 'BAB', 'B
AC', 'BBA', 'BBB', 'BBC', 'BCA', 'BCB', 'BCC', 'CAA', 'CAB', 'CAC', 'CBA', 'CBB'
, 'CBC', 'CCA', 'CCB', 'CCC']
</code></pre>