擅长:python、mysql、java
<p>文件末尾有一个新行<code>\n</code>。你可以这样把它去掉:</p>
<pre><code>import datetime
dnow = datetime.datetime.now()
with open("test.txt", 'r') as f:
racetime = f.read()
racetime = racetime.rstrip()
NewRaceTime = datetime.datetime.strptime(racetime, '%Y-%m-%d %H:%M:%S.%f')
timedifference = dnow - NewRaceTime
print racetime
</code></pre>