USQuote.unsubscribe 取消指定訂閲

從USQuote.get_subscriptions查看當前訂閲名單，用以USQuote.unsubscribe取消特定訂閲。

Example 1：取消訂閱 tick

input
api.USQuote.unsubscribe('qtTickv1.USStock.TSM')
output
INFO - StatusCode: Q000, Detail: Successfully Unsubscribed From qtTickv1.USStock.TSM

Example 2：取消訂閱 bidask

input
api.USQuote.unsubscribe('qtBidAskv0.USStock.TSM')
output
INFO - StatusCode: Q000, Detail: Successfully unsubscribed from qtBidAskv0.USStock.TSM

Example 3：取消訂閱 kbar

input
api.USQuote.unsubscribe('qtKBarv0.1.USStock.TSM')
output
INFO - StatusCode: Q000, Detail: Successfully unsubscribed from qtKBarv0.1.USStock.TSM

Example 4：取消訂閱 all

input
api.USQuote.unsubscribe('qtAllv1.USStock.TSM')
output
INFO - StatusCode: Q000, Detail: Successfully unsubscribed from qtAllv1.USStock.TSM

Attribute

參數 說明
key 為 `get_subscriptions` 得到的特定編碼，代表一個活躍訂閲的唯一標識。

Return Attribute

此方法不直接返回值，而是顯示訂閲行爲的信息。