擅长:python、mysql、java
<p>为什么不把它以生成器的形式封装在函数定义中,就像这样:</p>
<pre><code>>>> l1 = [1,2,3]
>>> l2 = [4,5,6]
>>> l3 = [7,8,9]
>>>
>>>
>>> def comb_gen(a,b,c):
for x in a:
for y in b:
for z in c:
yield (x,y,z)
>>>
>>> for x,y,z in comb_gen(l1,l2,l3):
print(x,y,z)
1 4 7
1 4 8
1 4 9
1 5 7
1 5 8
1 5 9
1 6 7
1 6 8
1 6 9
2 4 7
2 4 8
2 4 9
2 5 7
2 5 8
2 5 9
2 6 7
2 6 8
2 6 9
3 4 7
3 4 8
3 4 9
3 5 7
3 5 8
3 5 9
3 6 7
3 6 8
3 6 9
</code></pre>