擅长:python、mysql、java
<p>你无法战胜<a href="http://pandas.pydata.org/pandas-docs/stable/10min.html" rel="nofollow">pandas</a>的简单性。要读取文件:</p>
<pre><code>import pandas as pd
data = pd.read_csv('tracks_per_year.txt', sep='<SEP>')
data
# year uic artist song
#0 1981 uic1 artist1 song1
#1 1934 uic2 artist2 song2
#2 2004 uic3 artist3 song3
</code></pre>
<p>然后要按特定列排序并写入新文件,只需执行以下操作:</p>
<pre><code>data.sort(columns='year').to_csv('year_sort.txt')
</code></pre>