[Python] What does the |= (pipe equals) sign do in Python?

I saw the following piece of code in a project:

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()


What does the |= mean/do?

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