擅长:python、mysql、java
<pre><code>import os;
%loading names of files in A
A = os.listdir();
%creating B for intermediate processing
B = os.listdir();
i = 0;
for x in A:
t = x.split(".") %temp variable to store two outputs of split string
B[i] = t[0]+'12.txt'
os.rename(A[i],B[i])
i = i+1
</code></pre>