title: How to merge elements of two lists at the same index in Python?
body: <p>im new to python i've just started.
  so im trying to merge two lists into each other in one big list.
  input:</p>
  <pre><code>A = [[a,1],[b,2],[c,3]]
  B = [10,20,30]
  </code></pre>
  <p>desired output:</p>
  <pre><code>c = [[a,1,10],[b,2,20],[c,3,30]]
  </code></pre>
  <p>i tried insert method but it does not add B elements inside each individual list inside the A list
  and i tried <code>c.extend([a,b])</code> but it gave me this:</p>
  <pre><code>[10,[a,1],20,[b,2],30,[c,3]]
  </code></pre>
  <p>what seems to be the problem because im really confused.
  thanks</p>