擅长:python、mysql、java
<pre><code>for y in range(3):
for n,i in enumerate(x):
if i == 'line1\n':
x[n] = 'line1' + str(y) + '\n'
if i == 'line2\n':
x[n] = 'line2' + str(y) + '\n'
if i == 'line3\n':
x[n] = 'line3' + str(y) + '\n'
</code></pre>
<p>将每行设置为</p>
<p><code>x[n] = 'line1' + 0 + '\n'</code></p>
<p><code>x[n] = 'line2' + 0 + '\n'</code></p>
<p><code>x[n] = 'line3' + 0 + '\n'</code></p>
<p>然后,当您第二次回环时,所有行都将不满足您要检查的条件。你知道吗</p>