擅长:python、mysql、java
<p>您需要<a href="http://pandas.pydata.org/pandas-docs/dev/generated/pandas.DataFrame.head.html" rel="nofollow">head</a>,它查看前n行(默认为n=5):</p>
<pre><code>In [11]: df.head() # equivalent to df.head(5)
Out[11]:
Obama Romney dates
0 47.5 41.5 2/01/2011
1 47.5 41.5 2/02/2011
2 47.5 41.5 2/03/2011
3 47.5 41.5 2/04/2011
4 47.5 41.5 2/05/2011
</code></pre>
<p><em>或它的对立面,<a href="http://pandas.pydata.org/pandas-docs/dev/generated/pandas.DataFrame.tail.html" rel="nofollow">^{<cd1>}</a>,用于最后n行。</em></p>
<p>请注意,我们一致认为这是令人困惑的:<a href="http://pandas.pydata.org/pandas-docs/dev/whatsnew.html#dataframe-repr-changes" rel="nofollow">it's changing in 0.13</a>。以下是master/dev中的当前行为:</p>
^{pr2}$