擅长:python、mysql、java
<p>使用<a href="http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Index.append.html" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre><code>c = a.append(b)
print (c)
MultiIndex([( 'vowels', 'a'),
( 'vowels', 'e'),
('consonants', 'b'),
('consonants', 'c')],
)
</code></pre>