提取字符串 pandas 的最后一部分

Question

我有一列包含值：

虛擬數據：

df["temp_design"] = ['Are Premium Design tree (LKL#)',
       'THE Premium Design tree (TKL+)',
       'THZPremium Design tree (TKL+)',
       'THG THEM Entry tree temporary align (MKP#)', nan,
       'THZPremium Design tree (CHU#)',
       'THZPremium Design tree (ZHU2+)',
       'TRUE PREMIUM TEMPORARY DESIGN (ZHU+)',
       'BASIC TEMPORARY DESIGN (ZHU+)']

我想創建一個新列，其值存在於最后一個括號內。

誰能幫我去掉這個字符串？

df["output_col"] =["LKL#","TKL+","TKL+","MKP#","CHU#","ZHU2+","ZHU+","ZHU+"]

Answer 1

將 extract 與匹配左括號和右括號的正則表達式一起使用並在init中捕獲內容

df['temp_design'].str.extract(r'\((.*?)\)$') 

    0
0   LKL#
1   TKL+
2   TKL+
3   MKP#
4   NaN
5   CHU#
6   ZHU2+
7   ZHU+
8   ZHU+