擅长:python、mysql、java
<p>您可以使用<a href="https://docs.python.org/2/library/datetime.html" rel="nofollow noreferrer">datetime module</a>。假设您的日期是月/日/年:</p>
<pre><code>from datetime import datetime
date_string = "7/4/2014"
parts = date_string.split("/")
month = int(parts[0])
day = int(parts[1])
year = int(parts[2])
print(datetime(year, month, day).timetuple().tm_yday)
</code></pre>