code: def _place_order(self,
                     side,
                     product_id='BTC-USD',
                     client_oid=None,
                     type=None,
                     stp=None,
                     price=None,
                     size=None,
                     funds=None,
                     time_in_force=None,
                     cancel_after=None,
                     post_only=None):
      
      data = {
        'side':side,
        'product_id':product_id,
        'client_oid':client_oid,
        'type':type,
        'stp':stp,
        'price':price,
        'size':size,
        'funds':funds,
        'time_in_force':time_in_force,
        'cancel_after':cancel_after,
        'post_only':post_only
      }
      return self._post('orders', data=data)
docs: `<https://docs.exchange.coinbase.com/#orders>`_