擅长:python、mysql、java
<pre><code>s = "BINGO"
print(s.replace("", " ")[1: -1])
</code></pre>
<p>以下计时</p>
<pre><code>$ python -m timeit -s's = "BINGO"' 's.replace(""," ")[1:-1]'
1000000 loops, best of 3: 0.584 usec per loop
$ python -m timeit -s's = "BINGO"' '" ".join(s)'
100000 loops, best of 3: 1.54 usec per loop
</code></pre>