title: Python - Initializing List variable from List elements
body: <p>Ex. Lets consider, I have a list,</p>
  
  <p><code>list_var = ['sales_qty' , 'returns_qty' , 'net_sales_qty' , 'sales_amt' , 'returns_amt' ,'product_discount_amt' , 'product_net_amt' ,'product_cost_amt' , 'gross_sales_amt' , 'supplier_disc_amt' , 'category_disc_amt' , 'topup_disc_amt' , 'value_at_cost']</code></p>
  
  <p>from this list element, i want to init these elements as <code>list</code> in the memory, so i could use <code>append, extend</code> method for these elements.</p>
  
  <p>As follow,</p>
  
  <pre><code>#Need these variable in memory..
  sales_qty = [], returns_qty  = [], net_sales_qty = [] ... value_at_cost = []
  
  #list operation on variable..
  sales_qty.append(5)
  </code></pre>
  
  <p>Is there any simple way to do that, so i could remove element or add element in list easily?</p>