擅长:python、mysql、java
<pre><code>file_name = "test_file"
string_to_add = "added"
with open(file_name, 'r') as f:
file_lines = [''.join([x.strip(), string_to_add, '\n']) for x in f.readlines()]
with open(file_name, 'w') as f:
f.writelines(file_lines)
</code></pre>