<p>您可以使用新的<a href="http://pandas.pydata.org/pandas-docs/stable/advanced.html#using-slicers" rel="nofollow">^{<cd1>}</a>:</p>
<pre><code>In [17]:
idx = pd.IndexSlice
corrvals.loc[idx[:,'Value2']]
Out[17]:
Time
1 Value1 0.654654
Value2 1.000000
Value3 1.000000
2 Value1 -0.725288
Value2 1.000000
Value3 0.944911
3 Value1 -0.999569
Value2 1.000000
Value3 -0.121560
Name: Value2, dtype: float64
</code></pre>
<p>或<code>Slice</code>:</p>
<pre><code>In [18]:
corrvals.loc[slice(None),'Value2']
Out[18]:
Time
1 Value1 0.654654
Value2 1.000000
Value3 1.000000
2 Value1 -0.725288
Value2 1.000000
Value3 0.944911
3 Value1 -0.999569
Value2 1.000000
Value3 -0.121560
Name: Value2, dtype: float64
</code></pre>
<p>或将<code>axis=0</code>传递给<code>loc</code>:</p>
<pre><code>In [19]:
corrvals.loc(axis=0)[:,'Value2']
Out[19]:
Value1 Value2 Value3
Time
1 Value2 0.654654 1 1.000000
2 Value2 -0.725288 1 0.944911
3 Value2 -0.999569 1 -0.121560
</code></pre>