擅长:python、mysql、java
<p>在第一步中,将所有<code>a</code>替换为<code>b</code>:</p>
<pre><code>"aba" -> "bbb"
</code></pre>
<p>然后将<code>b</code>替换为<code>ab</code>:</p>
^{pr2}$
<p>如果要用字符替换字符,则必须循环<code>script</code>:</p>
<pre><code>SRS = { 'a':'b', 'b':'ab'}
script = "aba"
result = ""
for ch in script:
result += SRS[ch]
print(result)
</code></pre>