VSCode信息：

In [356]: Truth = pd.to_numeric(df.a.str.contains('None') == False).cumsum() 
     ...:                                                                                                                                                                                                  

In [357]: df.groupby(Truth)['b'].agg(list)                                                                                                                                                                 
Out[357]: 
a
0    [we,are the world]
1                   [we]
2            [love,the]
3                [world]
4                   [so]
5            [much,and]
6         [dance,every]
7            [day,yeah]
Name: b,dtype: object

Python扩展信息：

.this

VSCode不显示使用Version: 1.41.1 (system setup) Commit: 26076a4de974ead31f97692a0d32f90d735645c0 Date: 2019-12-18T14:58:56.166Z Electron: 6.1.5 Chrome: 76.0.3809.146 Node.js: 12.4.0 V8: 7.6.303.31-electron.0 OS: Windows_NT x64 10.0.18363 的通知窗口。