title: What does |= (pipe equal) sign do in python?
body: <p>I saw a piece of code in a project where following is written:</p>
  <pre><code> move = Move.create({
      'name': repair.name,
      'product_id': repair.product_id.id,
      'product_uom': repair.product_uom.id or repair.product_id.uom_id.id,
      'product_uom_qty': repair.product_qty,
      'partner_id': repair.address_id.id,
      'location_id': repair.location_id.id,
      'location_dest_id': repair.location_dest_id.id,
      'restrict_lot_id': repair.lot_id.id,
  })
  moves |= move
  moves.action_done()
  </code></pre>
  <p>What does the <code>|=</code> meaning here?</p>