擅长:python、mysql、java
<p>试试这个:</p>
<pre><code>for md in range(1,5):
for pico in range(21,25):
print "file-{0}-loop-{1}".format(md, pico)
</code></pre>
<p>或:</p>
<pre><code>from itertools import product
for md, pico in product(range(1,5), range(21,25)):
print "file-{0}-loop-{1}".format(md, pico)
</code></pre>