分列

df = pd.DataFrame({'id':[1,2,3],
                  'describe':['a-b-c','a-b-c','a-b-c']})
df['describe'].str.split('-',expand=False)  # 不自动分列
df['describe'].str.split('-',expand=True)  # 自动分列
# 如果只想要其中两列
df['describe'].str.split('-',expand=True)[[0,1]]

参考资料：https://blog.csdn.net/liuweiyuxiang/article/details/90936521?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0-90936521-blog-84699591.pc_relevant_multi_platform_whitelistv1&spm=1001.2101.3001.4242.1&utm_relevant_index=3