title: How to rename a groupby result coulmn in python
body: <p>I have a code, I want to change the name of "UC" column as "No.of RCA". Please help me in it.</p>
  
  <p>here is the code</p>
  
  <pre><code>    agency.groupby(['Agency']).agg({
  'UC':'count',
  'Total number of children aged 9 months less to 15 years assessed in this RCA':'sum',
  'Total number of children received TCV':'sum',
  'nonvaccinated':'sum'})
  </code></pre>