擅长:python、mysql、java
<p><code>open</code>命令创建一个新文件,因此您每次都要创建一个新文件。在</p>
<p>尝试在for循环之外创建文件</p>
<pre><code>import re
def main():
with open('sirs.txt') as f:
with open("sirs1.txt", "w") as fw:
for lines in f:
match = re.search('(AA|BB|CC|DD)......', lines)
if match:
a = match.group()
print(a)
fw.write(a)
</code></pre>