df_target['지하철역']=df_target['지하철역'].str.replace(r"(.*)","")
import re
for i in list: i=re.sub(pattern=r'([^)]*)', repl='', string=i) print(i) list
출처 : https://blog.naver.com/PostView.nhn?blogId=wideeyed&logNo=221347960543