擅长:python、mysql、java
<p>摆脱额外的进口和开销。正常读取文件,记住最后一行符合条件。在</p>
<pre><code>with ("camdex.txt", encoding="utf-8") as file:
for line in file:
if line.startswith("MEC"):
last = line
print(last[4:-1]) # "4" gets rid of "MEC "; "-1" stops just before the line feed.
</code></pre>
<p>如果文件非常大,那么向后读取是有意义的,查找到末尾,备份将比<em>读取</em>到结尾更快。在</p>