擅长:python、mysql、java
<p>IIUC<code>itertools</code></p>
<pre><code>import itertools
s=list(itertools.combinations(df.index, 2))
pd.Series([df.A.loc[x[1]]-df.A.loc[x[0]] for x in s ])
Out[495]:
0 10
1 200
2 3000
3 190
4 2990
5 2800
dtype: int64
</code></pre>
<p>更新</p>
<pre><code>s=list(itertools.combinations(df.index, 2))
pd.DataFrame([x+(df.A.loc[x[1]]-df.A.loc[x[0]],) for x in s ])
Out[518]:
0 1 2
0 0 1 10
1 0 2 200
2 0 3 3000
3 1 2 190
4 1 3 2990
5 2 3 2800
</code></pre>