Setting fixed length with python
<p>I have str that are like '60' or '100'.
I need the str to be '00060' and '00100', </p>

<p>How can i do this? 
code is something like this:
I was using  '0'+'0'+'0' as plug. now need to fix
d==0006000100  </p>

<pre><code>  a4 ='60'
  a5 ='100'

  d=('0'+'0'+'0'+a4+'0'+'0'+a5) 
</code></pre>
