擅长:python、mysql、java
<p>一旦到达流的末尾,您需要再次重新读取文件(您不需要关闭文件,因为您正在使用<code>with</code>),并且还需要修复错误的缩进:</p>
<pre><code>with open(r'C:\Users\Jayesh B\Documents\Programming\Python\Practicals\Program5\program5.txt','r') as target:
lines = target.readlines()
newfllines = []
for line in lines:
if line[0].lower() == 'a':
newfllines.append(line)
print(lines)
a = open(r'C:\Users\Jayesh B\Documents\Programming\Python\Practicals\Program5\program5.txt','r').read()
print(a)
</code></pre>
<p>您还可以使用<code>target.seek(0)</code>再次转到顶部</p>