sort series with pandas in python
<p>I selected one column from the a DataFrame, then I got a Series. How can I sort the series? I used the Series.sort(), but it doesn't work. </p>

<pre><code>df = pd.DataFrame({'A': [5,0,3,8],
                    'B': ['B8', 'B9', 'B10', 'B11']})
df

    A   B
0   5   B8
1   0   B9
2   3   B10
3   8   B11
</code></pre>

<p>Then I selected the column 'A'</p>

<pre><code>df['A']

    A
 0  5
 1  0
 2  3
 3  8
</code></pre>

<p>After selected 'A' column, I got a Series, but with Series.sort(), it doesn't work.</p>

<pre><code>df['A'].sort()
</code></pre>

<p>It shows the error:</p>

<p>"ValueError: This Series is a view of some other array, to sort in-place you must create a copy"</p>

<p>So I used the Series.copy() function to copy the series, after that I sort the series, but there is no outcome.</p>

<pre><code>df['A'].copy().sort()
</code></pre>

<p>But there is no result returned.</p>

<p>How can I fix the problem?</p>