title: Remove item from Dict/List
body: <p>My Webservice call to Mongo returns following JSON. I need to iterate this JSON value and remove the Item - product_language as it contain NULL/Empty string.</p>
  
  <p>ANy thoughts on how to do this?</p>
  
  <p>Python 3.4 version.</p>
  
  <p>{</p>
  
  <pre><code>"prod_doc_key" : "613509",
  
  "metadata" : {
      "channel_availability_for" : {
          "description" : "Kiosk and Web",
          "id" : 0
      },
  
      "dd_sold_out_flag" : 0,
      "dd_units_sold_flag" : 0,
      "display_type_id" : {
          "id" : 0
      },
      "preorder_flag" : 0,
      "price_in_cart_flag" : 0,
      "product_language" : "",
      "product_type" : {
          "id" : 0,
          "name" : "Product"
      },
      "promotion_flag" : 0,
      "published" : 1,
      "rebate_flag" : 0
  
  
  }
  </code></pre>
  
  <p>}</p>