title: Column without name in DataFrame
body: <p>I have a 4 <code>series</code> created by <code>counting</code> values in my DataFrame, which looks like</p>
  <pre class="lang-py prettyprint-override"><code>hello world    2
  aloha world        1
  Name: hello, dtype: int64
  
  </code></pre>
  <p>I'm trying to <code>concat</code> these data to one <code>dataframe</code> like</p>
  <pre class="lang-py prettyprint-override"><code>all_Data = pd.concat([series1, series2, series3, series4], axis=1)
  all_Data .columns = [&quot;col1&quot;, &quot;col2&quot;, &quot;col3&quot;, &quot;col4&quot;]
  </code></pre>
  <p>which create something like this</p>
  <pre class="lang-py prettyprint-override"><code>Name: hello, dtype: int64
             col1  col2   col3  col4
  hello world      2    0.0  0.0      0.0
  aloha world          1    1.0  0.0      1.0
  
  </code></pre>
  <p>which creates 4 columns - for values, but there is not a column name for the first column <code>hello world</code> etc values.
  I'm converting this <code>dataframe</code> to <code>dict</code> like</p>
  <pre><code>all_Data .to_dict(orient='records')
  </code></pre>
  <p>But there is not that first column with values (hello world, aloha world), how can I add that to the df?</p>