擅长:python、mysql、java
<p><strong>代码:</strong></p>
<pre><code>user = raw_input("welcome to cmd: ")
def print_perms(chars, minlen, maxlen):
for n in range(minlen, maxlen+1):
for perm in itertools.product(chars, repeat=n):
print(''.join(perm))
</code></pre>