quickest way to swap index with values : <p>consider the <code>pd.Series</code> <code>s</code></p>

<pre><code>s = pd.Series(list('abcdefghij'), list('ABCDEFGHIJ'))
s

A    a
B    b
C    c
D    d
E    e
F    f
G    g
H    h
I    i
J    j
dtype: object
</code></pre>

<p>What is the quickest way to swap index and values and get the following</p>

<pre><code>a    A
b    B
c    C
d    D
e    E
f    F
g    G
h    H
i    I
j    J
dtype: object
</code></pre>
