擅长:python、mysql、java
<p>我会像下面那样使用<code>re.sub</code></p>
<pre><code>import re
f = open('file', 'r') # Opens the file for reading
fil = f.read() # Read the entire data and store it in a variabl.
f.close() # Close the corresponding file
w = open('file', 'w') # Opens the file for wrting
w.write(re.sub(r';.*', r'', fil)) # Replaces all the chars from `;` upto the last with empty string.
w.close()
</code></pre>