擅长:python、mysql、java
<pre><code>import string
chars = string.ascii_lowercase + string.ascii_uppercase + " ."
encode = {ch:"{:02d}".format(i) for i,ch in enumerate(chars)}
def str2numsp(s):
return "".join(encode[ch] for ch in s)
</code></pre>
<p>它的工作原理是</p>
^{pr2}$