擅长:python、mysql、java
<pre><code>st = "SSViewer::set_theme('"
for line in open("file.txt"):
line=line.strip()
if st in line:
a = line[ :line.index(st)+len(st)]
b = line [line.index(st)+len(st): ]
i = b.index("')")
b = b[i:]
print a + "newword" + b
</code></pre>