列數組我有一個熊貓數據框,看起來像這樣:行值在大熊貓數據幀
+---+--------+-------------+------------------+
| | ItemID | Description | Feedback |
+---+--------+-------------+------------------+
| 0 | 8988 | Tall Chair | I hated it |
+---+--------+-------------+------------------+
| 1 | 8988 | Tall Chair | Best chair ever |
+---+--------+-------------+------------------+
| 2 | 6547 | Big Pillow | Soft and amazing |
+---+--------+-------------+------------------+
| 3 | 6547 | Big Pillow | Horrific color |
+---+--------+-------------+------------------+
我想從「反饋」列中的值連接成一個新列,用逗號隔開, ItemID匹配的地方。像這樣:
+---+--------+-------------+----------------------------------+
| | ItemID | Description | NewColumn |
+---+--------+-------------+----------------------------------+
| 0 | 8988 | Tall Chair | I hated it, Best chair ever |
+---+--------+-------------+----------------------------------+
| 1 | 6547 | Big Pillow | Soft and amazing, Horrific color |
+---+--------+-------------+----------------------------------+
我已經嘗試了幾個變化的樞軸,合併,堆疊等,我卡住了。
我認爲 NewColumn最終將成爲一個數組,但我相當新的Python,所以我不確定。
此外,最終,我要去嘗試,並使用這個文本分類(新的「描述」產生一些「反饋」標籤[多類問題])