PyQt5 QTableWidget 多選刪除
在QTableWidget中，呈現TABLE的方式是從1開始
但實際儲存方式，則是從0開始
也就是要刪除看到的第一列，參數要給0
self.ui.tableWidget.removeRow(0) #刪除看到的第一列
self.ui.tableWidget.removeRow(1) #刪除看到的第二列
self.ui.tableWidget.removeRow(N-1) #刪除看到的第N列
但是要多選刪除時
就不是簡單的跑一個迴圈就行了
items = self.ui.tableWidget.selectedIndexes()
wannaDelRows = [item.row() for item in items]
for row in wannaDelRows:
self.ui.tableWidget.removeRow(row)
實際運行會發現，只有第一列正確被刪除，其他列似乎全都不對了？！
錯誤的原因是因為第一列被刪除後，該列後方的所有位置也跟著減-1了！
也就是當你只是單純地使用selectedIndexes()取得多選的列來刪除的話，從第2筆開始的指到row，已經不在是當初user選到要刪除的row了！
那該怎麼解決呢？
很簡單，從後面開始刪除就行了！
為避免user選的item是同一個row不同column
造成同一個row取到2次，導致跑迴圈時刪除到不應該被刪掉的
因此還需要搭配set確保要刪除的row只會被執行一次
將原本的程式碼修改如下
items = self.ui.tableWidget.selectedIndexes()
wannaDelRows = [item.row() for item in items]
wannaDelRowsReverse = sorted(set(wannaDelRows),reverse=True)
for row in wannaDelRowsReverse:
self.ui.tableWidget.removeRow(row)
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